Overview
Interesting Facts
Common Names
Click on the language to view common names.
Common Names in English:
Nodding Trillium, Nodding Wake-Robin, Northern Nodding Wake-Robin, Whip-Poor-Will Flower, Whip-Poor-Will-Flower
Common Names in French:
Trille Penché
Description
Genus Trillium
Herbs, perennial
, scapose
, rhizomatous
; rhizomes subterranean
, horizontal or semierect, monopodial, unbranched or weakly branched, elongated to thick and fleshy
, compressed-shortened, distal end tapered to point
or praemorse
, apex bearing large terminal
bud, numerous
cataphylls, and contractile, adventitious, ringed roots
. Scapes arising from terminal bud or axil of adjacent
cataphylls, aerial
(subterranean in T. petiolatum), erect
, straight (decumbent
, S-shaped in T. decumbens and T. reliquum). Bracts on mature
plants
in whorl of 3, uniformly green or mottled
, foliaceous
, petiolate
or sessile, venation
palmate-reticulate, with 3-5 major veins, ovate
or obovate
to elliptical
. Inflorescences terminal, 1-flowered. Flowers: some totally to partially syncarpous
, pedicellate
or sessile; sepals persistent
, 3, distinct
, green, maroon, or with maroon markings, foliaceous, oblong
, ovate, or lanceolate, alternating with bracts; petals shriveling after anthesis
, typically 3, erect, spreading
, or recurved, distinct, red, purple, pink, white, yellow, green, or combination
of these, ovate or obovate to linear
, sometimes clawed; stamens 6, alternating in 2 whorls of 3, erect, incurved
, or divergent; filaments
mostly short, basally expanded; anthers
2-locular, ± equaling or longer
than filaments, dehiscence extrorse
, latrorse
, or introrse
; connectives
flat between (or in some species extending beyond) anther sacs
; ovary superior, proximal
portion 3-locular, 3- or 6-lobed, some axile
, some parietal
or a combination of both, distal portion forming stigmas; stigmas often persistent, 3, spreading, twisted, or erect, sometimes connate
, sessile or with very short style, linear to subulate
. Fruits capsular
or baccate
, fleshy with obscure
sutures, not or rarely dehiscent
along sutures, each shed as unit
through abscission of thin-walled cells
at base
. Seeds many, elliptic
, 2-4 mm, bearing white or yellowish, large, oily, myrmecochorous elaiosome (aril). x
= 5. 2n = 10 in all American species recorded.
Species 43: North America, Asia.
Trillium is traditionally divided
into two subgenera
, which overlap in some characters. Botanists consider subg. Trillium to be the more primitive group, because the genera considered closest to Trillium all have pedicellate flowers, as does subg. Trillium, except for one variety of T. pusillum that bears sessile to only barely pedicillate flowers.
There is not yet agreement among taxonomists about the relationships
among the species within the genus. Certain ones, such as Trillium recurvatum and T. lancifolium, clearly are closely related, but the interrelationships of many others are not obvious. In the absence of definitive studies, the species are listed here alphabetically within subgenera. Several species of Trillium contain sapogenins
that have been used medicinally as astringents, coagulants
, expectorants
, and uterine stimulants, hence the common names
birthwort and Indian balm, and T. erectum, T. grandiflorum, and possibly other species have been utilized commercially as beth root (W. B
. Zomlefer 1996). Fruits, seeds, and rhizomes of trilliums are generally considered to be poisonous. Deer, however, feed
voraciously on T. grandiflorum plants, especially in early spring
. Gardeners and wildflower enthusiasts, over most of the temperate
zones of the world, consider trilliums to be among the most beautiful of wildflowers. Species of Trillium exhibit few and obscure structural differences, making key
construction difficult (J. D. Freeman 1975).[1]
Physical Description
Species Trillium cernuum
Rhizomes short, thick. Scapes 1-2(-3), round
in cross
section
, 1.5-4+
dm, slender, glabrous
. Bracts often overlapping, sessile or with
a barely noticeable, petiolelike base
, umbrellalike; blade
bright
green without red tones, broadly rhombic-ovate to suborbicular
, 5-15
× 6-15+ cm, base attenuate, apex acuminate. Flower usually
hidden beneath
bracts, nodding
, odorless; sepals spreading
, green,
lanceolate-ovate, 9-30 mm, slightly shorter than to equaling petals,
margins
slightly raised, apex acuminate; petals usually strongly
recurved from above base, extending behind
plane
of sepal bases for
more than 1/2 their length
, white or rarely pale
pink, adaxial
veins
not conspicuous
, oblong-lanceolate, 1.5-2.5 × 0.9-1.5 cm, thin-textured,
margins entire, apex acuminate; stamens ± straight, 6-15 mm,
shorter than pistil, slender; filaments
white, ± equaling
anthers
, slender; anthers straight, pale lavender-pink or -gray,
2-6.5 mm, dehiscence introrse
to latrorse
; ovary prominent
, white
to pinkish, pyramidal
, strongly 6-angled, 3-12 × 3-10 mm, widest
above basal attachment; stigmas erect
, recurved, distinct
, white,
not lobed
adaxially, 3-8 mm, widest at base, fleshy
, basally thickened,
gradually tapered; pedicel strongly recurved or declined below or
angled
between bracts, 1.5-3 cm. Fruits dark red, with fruity fragrance,
ovoid
, to 3 cm diam., fleshy, juicy. 2n = 10. [source]
Previous authors
commonly recognized var. cernuum and var. macranthum,
based primarily upon size differences. Plants
attributed to var.
cernuum are found from Delaware and eastern Pennsylvania northward
to Newfoundland, while those attributed to var. macranthum are found
mainly farther inland into the Midwest. Although there is a tendency
for the eastern seaboard plants to be somewhat smaller and more delicate,
and the midwestern and far northern plants to be more robust
, there
is much variation
, largely dependent
on soil nutrients
. There are
regional size trends, but based on my observations of this species
in Newfoundland, Michigan, Wisconsin, and Minnesota, I do not believe
that the two varieties can be maintained. [source]
In the Gray Herbarium
, there is a collection
by Richardson labeled
"Mackenzie River", which has been cited by H. M.
Raup (1947)
and others. W. J. Hooker ([1829-]1833-1840) reported Trillium cernuum
œfrom Saskatchewan to Mackenzie River
. Raup stated that œit is the
only evidence for the occurrence of...Trillium in the entire Mackenzie
Basin
. Other writers have simply quoted that statement. In view
of the relatively great disjunction
from the known Saskatchewan stations
and in the absence of any other supporting specimens from that area,
I believe that there might be locality
error
on the Richardson sheet.
However, it is not beyond possibility that T. cernuum could occur
there. This apparent disjunct
station is not mapped here. [source]
Habit: Forb/herb
Flowers: Bloom Period: February, March, April, May, June, July. • Flower Color: near white, white
Size/Age/Growth
Size: 12-18" tall.
Habitat
Rich, mostly deciduous forest southward, mixed deciduous-coniferous forests, swamps , moist coniferous forests northward; 30--600 m (Ref. 104055).
Typically found at an altitude of 0 to 931 meters (0 to 3,054 feet).[2]
Biology
Reproduction
Duration: Perennial
Growth
Culture: Space 24-36" apart.
Sunlight: Sun Exposure: Light Shade.
Temperature: Cold Hardiness: 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b. (map)
Taxonomy
- Domain:
Eukaryota
(
)
- Whittaker & Margulis,1978
- eukaryotes
- Kingdom:
Plantae
(
)
- Haeckel, 1866
- Plants
- Subkingdom:
Viridaeplantae
(
)
- Cavalier-Smith, 1981
- Phylum:
Tracheophyta
(
)
- Sinnott, 1935 ex Cavalier-Smith, 1998
- Vascular Plants
- Subphylum:
Euphyllophytina
(
)
- Infraphylum:
Radiatopses
(
)
- Kenrick & Crane, 1997
- Class:
Spermatopsida
(
)
- Brongniart, 1843
- Subclass:
Liliidae
(
)
- Takhtajan, 1967
- Superorder:
Lilianae
(
)
- Takhtajan, 1967
- Order:
Liliales
(
)
- Perleb, 1826
- Family:
Melanthiaceae
(
)
- Batsch, 1802, nom. cons.
- Genus:
Trillium
(
)
- C. Linnaeus, 1753
- Trille [Latin, trilix, triple, alluding to the flowers having parts in threes]
- Specific epithet:
cernuum
- Barton
- Botanical name: - Trillium cernuum Barton
- Specific epithet:
cernuum
- Barton
- Genus:
Trillium
(
- Family:
Melanthiaceae
(
- Order:
Liliales
(
- Superorder:
Lilianae
(
- Subclass:
Liliidae
(
- Class:
Spermatopsida
(
- Infraphylum:
Radiatopses
(
- Subphylum:
Euphyllophytina
(
- Phylum:
Tracheophyta
(
- Subkingdom:
Viridaeplantae
(
- Kingdom:
Plantae
(
Synonyms
Trillium cernuum var. macranthum Eames & Wiegand • Trillium stylosum Nutt.
Notes
Publishing author : Barton Publication : Fl. N. Amer. (Barton) 2: 13, t. 40 1821 [Jul-Dec 1821]
Similar Species
Members of the genus Trillium
ZipcodeZoo has pages for 58 species, subspecies, varieties, forms, and cultivars in this genus:
T. albidum (Giant Trillium) · T. angustipetalum (Narrowpetal Wakerobin) · T. catesbaei (Bashful Wakerobin) · T. cernuum (Nodding Trillium) · T. chloropetalum (Giant Wakerobin) · T. chloropetalum (Torr.) Howell var. chloropetalum (Torr.) T.J.Howell (Giant Wakerobin) · T. chloropetalum giganteum (Giant Wakerobin) · T. chloropetalum var. chloropetalum (Giant Wakerobin) · T. chloropetalum var. giganteum (Giant Wakerobin) · T. cuneatum (Little Sweet Betsy) · T. decipiens (Chattahoochee River Wakerobin) · T. decumbens (Trailing Trillium) · T. discolor (Mottled Wakerobin) · T. erectum (Red Erect Trillium) · T. erectum f. albiflorum (White Erect Trillium) · T. erectum var. japonicum (Stinking Benjamin) · T. flexipes (Bent Trillium) · T. foetidissimum (Mississippi River Wakerobin) · T. gracile (Sabine River Wakerobin) · T. grandiflorum (Great White Trillium) · T. grandiflorum f. polymerum 'Flore Pleno' (Double-Flowered American Wake-Robin) · T. grandiflorum Gothenburg pink strain (Great White Trillium) · T. grandiflorum 'Flore Pleno' (Trillium) · T. kamtschaticum (Trillium) · T. kurabayashi (Wake Robin) · T. kurabayashii (Giant Purple Wakerobin) · T. lancifolium (Lanceleaf Wakerobin) · T. ludovicianum (Louisiana Wakerobin) · T. luteum (Lemon Trillium) · T. maculatum (Spotted Wakerobin) · T. nivale (Dwarf White Wakerobin) · T. ovatum (Pacific Trillium) · T. ovatum oettingeri (Oettinger's Trillium) · T. ovatum 'Roy Elliott' (Western Trillium) · T. parviflorum (Smallflower Wakerobin) · T. persistens (Persistent Trillium) · T. petiolatum (Idaho Trillium) · T. pusillum (Dwarf Wakerobin) · T. pusillum var. ozarkanum (Ozark Wake-Robin) · T. pusillum var. pusillum (Dwarf Wakerobin) · T. pusillum var. virginianum (Virginia Wakerobin) · T. rectum (Stinking Benjamin) · T. recurvatum (Bloody Butcher) · T. reliquum (Confederate Wakerobin) · T. reliquum f. luteum (Relic Trillium) · T. rivale (Brook Wakerobin) · T. rugelii (Ill-Scented Wakerobin) · T. sessile (Common Toad Shade) · T. simile (Jeweled Wake Robin) · T. stamineum (Blue Ridge Wakerobin) · T. sulcatum (Barksdales Trillium) · T. texanum (Texas Trillium) · T. tschonoskii (Tschonoskis Wake Robin) · T. underwoodii (Lonbract Wakerobin) · T. undulatum (Painted Trillium) · T. vaseyi (Sweet Wakerobin) · T. viride (Wood Wakerobin) · T. viridescens (Tapertip Wakerobin)
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Further Reading
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Notes
Contributors
- Brands, S.J. (comp.) 1989-present. The Taxonomicon. Universal Taxonomic Services, Zwaag, The Netherlands. Accessed January 9, 2012.
Data Sources
Accessed through GBIF Data Portal November 19, 2007:
- Canadian Museum of Nature, Canadian Museum of Nature Herbarium
- Harvard University Herbaria, Harvard University Herbaria
- The New York Botanical Garden, Vascular Plant Type Specimens
- USDA PLANTS, USDA PLANTS Database
Identifiers
- Biodiversity Heritage Library NamebankID: 2662677
- Catalogue of Life Accepted Name Code: Kew-290615
- Global Biodiversity Information Facility Taxonkey: 13754695
- Globally Unique Identifier: urn:lsid:ipni.org:names:542527-1
- Integrated Taxonomic Information System (ITIS) Taxonomic Serial Number (TSN): 43065
- International Plant Names Index (IPNI) ID: 542525-1
- U.S.D.A. Plant Symbol: TRCEM
- Zipcode Zoo Species Identifier: 64312
Footnotes
- Frederick W. Case Jr. "Trillium". in Flora of North America Vol. 26 Page 51, 54, 56, 90, 91, 97, 101, 110, 113, 150. Oxford University Press. Online at EFloras.org. [back]
- Mean = 255.030 meters (836.713 feet), Standard Deviation = 162.720 based on 309 observations. Altitude information for each observation from British Oceanographic Data Centre. [back]
