Overview
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Threatened |
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Interesting Facts
Common Names
Common Names in English:
Nodding Rock Daisy, Nodding Rockdaisy, Organ Mountain Rock Daisy, Organ Mountain Rockdaisy
Description
Family Compositae
The largest family of flowering plants , the Compositae (Asteraceae), comprising about 1,100 genera and more than 20,000 species and characterized by many small flowers arranged in a head looking like a single flower and subtended by an involucre of bracts. A head may consist of both ray flowers and disk flowers, as in the sunflower, of disk flowers only, as in the burdock, or of ray flowers only, as in the dandelion.
Genus Perityle
Annuals
, perennials
, subshrubs
, or shrubs
, 2-45(-75) cm (glabrous
or hairy
, often gland-dotted). Stems erect
to pendent. Leaves mostly cauline; often proximally opposite, distally alternate; petiolate
or sessile; blades
usually 3-lobed, ultimate
margins
entire, toothed
, or lobed
. Heads radiate
or discoid
, borne singly or in corymbiform
arrays. Involucres campanulate
, cylindric
, funnelform
, or hemispheric
, 3-15 mm diam. Phyllaries persistent
, 5-28 in (1-) 2(-3) series (distinct
, linear
to ovate
, equal or subequal
, flat or keeled
, glabrous or hairy, apices obtuse
, acute, or attenuate). Receptacles flat or convex
, pitted
, epaleate. Ray florets 0, or (1-) 3-18, pistillate
, fertile
; corollas cream, yellow, or white (showy or rudimentary
). Disc florets 5-200, bisexual
, fertile; corollas cream, yellow, or white, tubes
shorter than or nearly equal to cylindric, funnelform, or campanulate throats, lobes
4, ± deltate (acute; stamens 4; style branches flattened, linear, usually tapering to fine, minutely hairy tips). Cypselae (black) flattened to subcylindric
, linear to oblanceolate
or obovate
(margins ± calloused and glabrous, hairy, or ciliate
, faces
usually hairy, sometimes glabrous) ; pappi 0, or persistent or falling, of 1-35 bristles
plus callous
crowns or hyaline
scales
. x = 17, 19.
Species 66: United
States, Mexico, South America.
Most species of Perityle are rock-dwelling subshrubs exhibiting geographic speciation
; most are found in the eroded
mountain and basin
region of the southwestern United States.[1]
Physical Description
Species Perityle cernua
Plants 3-12(-20) cm (closely appressed to rocks) ; glabrate or with transparent, multicellular hairs on petioles , peduncles, and phyllaries. Leaves: petioles 7-25 mm; blades ovate-reniform to ovate-cordate, 10-40 × 8-40 mm, margins unevenly serrate-dentate. Heads borne singly (nodding or erect ), 10-12 × 12-14 mm. Peduncles 10-19 mm. Involucres broadly campanulate . Phyllaries 18-28, linear-lanceolate, 6-9 × 1.2-2 mm. Disc florets 20-150; corollas yellow, tubes 1.2-2 mm, throats narrowly funnelform , 2-3.3 mm, lobes 0.7-0.8 mm. Cypselae 2.1-3 mm; pappi of 25-35 bristles 0.5-1.5(-2) mm. 2n = 34 + 1 frag. [source]
Flowers: Bloom Period: February, March, April, May, June, July, August, September, October.
Habitat
Limestone or igneous cliffs and slopes ; of conservation concern; 1600-3000 m [2].
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
()
- Class:
Spermatopsida
()
- Brongniart, 1843
- Subclass:
Asteridae
()
- Takhtajan, 1967
- Superorder:
Campanulanae
()
- Takhtajan Ex Reveal, 1992
- Order:
Asterales
()
- Lindley, 1833
- Family:
Compositae
()
- Giseke, 1792, nom. cons., nom. alt.
- Subfamily:
Asteroideae
()
- Tribe:
Helenieae
()
- Subtribe:
Peritylinae
()
- Genus:
Perityle
()
- Bentham, 1844
- Rock daisy [Greek peri, around, and tyle, a callus, alluding to calloused cypselae margins]
- Specific epithet:
cernua
- (Greene) Shinners
- Botanical name: - Perityle cernua (Greene) Shinners
- Specific epithet:
cernua
- (Greene) Shinners
- Genus:
Perityle
(
- Subtribe:
Peritylinae
(
- Tribe:
Helenieae
(
- Subfamily:
Asteroideae
(
- Family:
Compositae
(
- Order:
Asterales
(
- Superorder:
Campanulanae
(
- Subclass:
Asteridae
(
- Class:
Spermatopsida
(
- Subphylum:
Euphyllophytina
(
- Phylum:
Tracheophyta
(
- Subkingdom:
Viridaeplantae
(
- Kingdom:
Plantae
(
Synonyms
Bull. Torrey Bot. Club 25: 122 • Figs. 3 • Laphamia angustifolia Gray • Laphamia angustifolia laciniata (Gray) Niles • Laphamia cernua Greene • Pappothrix cernua (Greene) Rydb. • Plate 333
Notes
Name
Status: Accepted Name
.
Comment: Data Providers: IPNI, Tropicos. GCC LSID: urn
:lsid:compositae.org:names:D9EA60CC-731A-4046-9435-F15EC91CBEDF
Last scrutiny: 15-Aug-09
Similar Species
Members of the genus Perityle
ZipcodeZoo has pages for 55 species, subspecies, varieties, forms, and cultivars in this genus:
P. aglossa (Bluff Rock Daisy) · P. ajoensis (Ajo Rock-Daisy) · P. ambrosiifolia (Lace-Leaf Rock Daisy) · P. angustifolia (Narrow-Leaved Rockdaisy) · P. bisetosa (Two-Spike Rock Daisy) · P. bisetosa var. appressa (Twobristle Rockdaisy) · P. bisetosa var. bisetosa (Twobristle Rockdaisy) · P. bisetosa var. scalaris (Twobristle Rockdaisy) · P. californica (California Rock Daisy) · P. cernua (Nodding Rock Daisy) · P. ciliata (Ciliate Rockdaisy) · P. cinerea (Gray Rock Daisy) · P. cochisensis (Cochise Rock Daisy) · P. congesta (Compact Rock Daisy) · P. coronopifolia (Arizona Rockdaisy) · P. dissecta (Dissected Rockdaisy) · P. emoryi (Emory Rockdaisy) · P. fosteri (Foster's Rock-Daisy) · P. gilensis (Fish Creek Rockdaisy) · P. gilensis var. gilensis (Fish Creek Rockdaisy) · P. gilensis var. salensis (Salt River Rockdaisy) · P. gracilis (Grass Leaf Rock Daisy) · P. huecoensis (Hueco Mountains Rockdaisy) · P. incana (Perityle) · P. intricata (Delicate Rock-Daisy) · P. inyoensis (Inyo Rock Daisy) · P. lemmonii (Lemmon's Rock-Daisy) · P. lindheimeri (Bluffdaisy) · P. lindheimeri var. halimifolia (Lindheimers Rockdaisy) · P. lindheimeri var. lindheimeri (Lindheimer's Rockdaisy) · P. megalocephala (Bighead Rockdaisy) · P. megalocephala var. megalocephala (Limestone Rockdaisy) · P. megalocephala var. oligophylla (Small-Leaved Rockdaisy) · P. microglossa (Mazanilla Bronca) · P. microglossa var. microglossa (Shortray Rockdaisy) · P. microglossa var. saxosa (Shortray Rockdaisy) · P. parryi (Heartleaf Rockdaisy) · P. quinqueflora (Five Flower Rock Daisy) · P. rupestris (Leafy Rockdaisy) · P. rupestris var. albiflora (Leafy Rockdaisy) · P. rupestris var. rupestris (Leafy Rockdaisy) · P. saxicola (Fish Creek Rock Daisy) · P. specuicola (Alcove Rockdaisy) · P. stansburii (Standbury's Rockdaisy) · P. stansburyi (Stansbur's Rockdaisy) · P. staurophylla (New Mexico Rockdaisy) · P. staurophylla (Barneby) Shinners var. homoflora T.K. Todsen (New Mexico Rockdaisy) · P. staurophylla var. homoflora (New Mexico Rockdaisy) · P. staurophylla var. staurophylla (New Mexico Rockdaisy) · P. tenella (Springdale Rockdaisy) · P. turneri (Turner's Rockdaisy) · P. vaseyi (Margined Rockdaisy) · P. villosa (Hanaupah Laphamia) · P. vitreomontana (Glass Mountain Rockdaisy) · P. warnockii (River Rock-Daisy)
More Info
- Search for Pictures: images.google.com
- Search for Scholarly Articles: Google Scholar
- Search using Scientific Name and Vernacular Names: All the Web | AltaVista Canada | AltaVista | Excite | Google | HotBot | Lycos
- Search using Specialized Databases: GenBank | Medline | Scirus | CISTI/CAL | Agricola Periodicals | Agricola Books
Further Reading
Notes
Contributors
- Brands, S.J. (comp.) 1989-present. The Taxonomicon. Universal Taxonomic Services, Zwaag, The Netherlands. Accessed January 12, 2012.
Data Sources
Accessed through GBIF Data Portal December 04, 2007:
- USDA PLANTS, USDA PLANTS Database
Identifiers
- Biodiversity Heritage Library NamebankID: 2659122
- Catalogue of Life Accepted Name Code: Ast-13204
- Global Biodiversity Information Facility Taxonkey: 13750375
- Globally Unique Identifier: urn:lsid:ipni.org:names:237144-1
- Integrated Taxonomic Information System (ITIS) Taxonomic Serial Number (TSN): 38204
- Natural Heritage Network Species Identifier: PDAST70050
- U.S.D.A. Plant Symbol: LACE2
- Zipcode Zoo Species Identifier: 45249
Footnotes
- Sharon C. Yarborough, A. Michael Powell "Perityle". in Flora of North America Vol. 21 Page 317, 333, 334. Oxford University Press. Online at EFloras.org. [back]
- "Perityle cernua". in Flora of North America Vol. 21 Page 311, 318, 319. Oxford University Press. Online at EFloras.org. [back]
