Click on the language to view common names.
Common Names in English:
Bear Grass, Bear-Grass, Beargrass, Great Plains Yucca, Small Soapweed, Soapweed, Soapweed Yucca, Soapwell, Spanish Bayonet, Yucca
Common Names in German:
Common Names in Informal Latinized N:
Common Names in Russian:
Jukka Sizaja, юкка сизая
Common Names in Swedish:
, sometimes subscapose
, sometimes arborescent
, usually branching extensively, from woody, subterranean
or aboveground caudices, or single stems. Leaves sessile, in rosettes on caudices or at branch
linear-lanceolate, expanded basally, usually rigid
, occasionally fleshy
entire or denticulate
, often filiferous
and separating into elongated fibers, corneous
, apex mostly sharp-pointed. Scape, when present, usually less than 2.5 cm diam. Inflorescences erect
or rarely pendent, paniculate
or racemose, sometimes paniculate proximally and racemose distally, bracteate
, occasionally pubescent
; bracts ascending
, erect, or rarely reflexed
; peduncle sometimes scapelike, sometimes extending beyond leaves, sometimes pubescent. Flowers bisexual
; perianth campanulate
; tepals 6, similar, fleshy, distinct
to or connate
, whitish to cream or tinged slightly with green or purple, occasionally pubescent; stamens 6; filaments
flattened, as wide as anthers
, or granular
, fleshy; pistil obovoid
or oblong-cylindrical; ovary superior, usually green, 3-locular or 6-locular with false septa, 6-lobed; style white to dark green, often thick; stigmas usually 3, sometimes 1 and subcapitate
, white to pale
green, 1-2 mm.
Fruits erect or pendent, capsular
. Seeds many per locule, usually black, occasionally gray, flattened, round
, rarely obovate
= 25, 30.
Species ca. 35-40: e coastal plain , se, sc, w United States, n, c, w Mexico, n Central America.
W. Trelease (1902) recognized Hesperoyucca, Clistoyucca, and Samuela as segregates from, but closely related to, Yucca. S. D. McKelvey (19381947) returned them to Yucca, recognizing sections Hesperoyucca and Clistoyucca, and placing Samuela in section Sarcocarpa. However, McKelvey indicated that there is ample justification for recognizing Hesperoyucca at genus level, since a number of flower and fruit characters differ from those in all other sections. Recent DNA evidence provides strong support for separate recognition of Hesperoyucca (M. A. Hanson 1993; D. J. Bogler 1994; D. J. Bogler and B . B. Simpson 1995, 1996; K . H. Clary 1997). Clarys data indicate that it is more closely related to Hesperaloe than to Yucca, and that Clistoyucca and Samuela should be retained in Yucca.
Yuccas are often cultivated in many places in the United States, particularly in the south. They are not easily identified, particularly in herbarium specimens, and collectors should be certain to record information about the habits and sizes of plants, and the colors of ovaries, styles, and stigmas. If possible, field photographs of the pistil and stamens should accompany the specimens.
Species Yucca glauca
forming small to moderate colonies, acaulescent
, occasionally branched; rosettes 1-15 per colony
usually small. Stems erect
, to 0.4 m.
, widest near middle
, 40-60 × 0.8-1.2
, white, apex blunt
Inflorescences racemose, occasionally paniculate
within or just beyond rosettes, 5-10 dm; bracts erect, leaflike,
2-5 cm, reduced toward apex; peduncle scapelike, 0.2-0.5 m
than 2.5 cm diam. Flowers pendent; tepals distinct
, greenish white
to white, elliptic
, 5-5.3 × 2.6-3.5 cm, apex acute; filaments
white, 1.7-1.9 cm; anthers
yellow, 4 mm; pistil green, obovoid
× 1.7 cm; style dark green, 10 mm; stigmas lobed
. Fruits erect,
to obovoid, rarely constricted
× 3-4.5(-5) cm, dehiscence septicidal
. Seeds black, slightly
glossy, thin, 9-12 × 8-9 mm.
Yucca glauca has the most extensive distribution of any North American Yucca. Its inflorescences are primarily racemose, but some plants exhibit branched inflorescences and varietal names have been given them. Yucca glauca and Y. arkansana are very similar. The leaves of Y. glauca are uniform in size, rigid, linear or linear-lanceolate, and up to 1.2 cm wide. In Y. arkansana, the young leaves immediately surrounding the peduncle are distinctly shorter than the outer leaves of the rosette, and mature leaves are generally somewhat flexible , lanceolate, and up to 2.5 cm wide. K . H. Clary™s (1997) DNA evidence does not indicate as close a relationship as the morphological characters suggest. J. M. Webber (1953) believed that Y. glauca forms hybrids with Y. baileyi, Y. elata, Y. constricta, and Y. angustissima. [source]
Habit: Subshrub , Shrub , Forb/herb
Flowers: Bloom Period: February, March, April. • Flower Color: pale yellow
Size: 24-36" tall.
Prairies and waste areas in sandy or limestone soils; 500--2600 m .
Culture: Space 24-36" apart.
Soil: Minimum pH: 6.6 • Maximum pH: 8.5
Sunlight: Sun Exposure: Sun to Partial Shade.
Moisture: Drought Tolerance: High
Temperature: Cold Hardiness: 4a, 4b, 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b, 9a, 9b, 10a, 10b. (map)
- Whittaker & Margulis,1978
- Haeckel, 1866
- Cavalier-Smith, 1981
- Sinnott, 1935 ex Cavalier-Smith, 1998
- Vascular Plants
- Kenrick & Crane, 1997
- Brongniart, 1843
- Takhtajan, 1967
- Takhtajan, 1967
- Bromhead, 1838
- Suborder: Asparagineae () -
- Order: Asparagales () - Bromhead, 1838
- Superorder: Lilianae () - Takhtajan, 1967
- Subclass: Liliidae () - Takhtajan, 1967
- Class: Spermatopsida () - Brongniart, 1843
- Infraphylum: Radiatopses () - Kenrick & Crane, 1997
- Subphylum: Euphyllophytina ()
- Phylum: Tracheophyta () - Sinnott, 1935 ex Cavalier-Smith, 1998 - Vascular Plants
- Subkingdom: Viridaeplantae () - Cavalier-Smith, 1981
- Kingdom: Plantae () - Haeckel, 1866 - Plants
Y. glauca var. gurneyi Mckelvey • Y. glauca var. stricta (J. Sims) Trelease • Y. stricta J. Sims • Yucca angustifolia Pursh • Yucca angustissima Engelm. • Yucca flaccida Haw. var. integra Trel.
Publishing author : Nutt. Publication : Cat. Pl. Upper Louisiana no. 89 1813 [ante Aug 1813]
Members of the genus Yucca
ZipcodeZoo has pages for 90 species, subspecies, varieties, forms, and cultivars in this genus:
Y. aloifolia (Aloe Yucca) · Y. aloifolia L. 'Marginata' (Variegated Spanish Bayonet) · Y. angustissima (Narrow-Leaved Yucca) · Y. angustissima var. angustissima (Narrowleaf Yucca) · Y. angustissima var. kanabensis (Kanab Yucca) · Y. angustissima var. toftiae (Toft's Yucca) · Y. arkansana (Arkansas Yucca) · Y. baccata (Banana Yucca) · Y. baccata var. baccata (Banana Yucca) · Y. baccata var. brevifolia (Spanish Dagger) · Y. baccata var. vespertina (Banana Yucca) · Y. baileyi (Navajo Yucca) · Y. baileyi var. baileyi (Bailey's Yucca) · Y. baileyi var. intermedia (Intermediate Yucca) · Y. baileyi var. navajoa (Navajo Yucca) · Y. brevifolia (Joshua Tree) · Y. brevifolia f. herbertii (Joshua Tree) · Y. brevifolia herbertii (Joshua Tree) · Y. brevifolia jaegeriana var. jaegeriana (Jaeger Joshua Tree) · Y. brevifolia var. brevifolia (Joshua Tree) · Y. brevifolia var. jaegeriana (Jaeger's Joshua Tree) · Y. campestris (Plains Yucca) · Y. carnerosana (Giant Spanish Dagger) · Y. cernua (Nodding Yucca) · Y. constricta (Buckley Yucca) · Y. decipiens (Palma China) · Y. desmetiana (Yucca) · Y. elata (Soaptree Yucca) · Y. elata Engelm. var. verdiensis (McKelvey) Reveal (Soaptree Yucca) · Y. elata utahensis (Utah Yucca) · Y. elata var. elata (Soaptree Yucca) · Y. elata var. utahensis (Utah Yucca) · Y. elata var. verdiensis (Soaptree Yucca) · Y. elephantipes 'Variegata' (Variegated Spineless Yucca) · Y. endlichiana (Yucca) · Y. faxoniana (Carneros Yucca) · Y. filamentosa (Adam's Needle) · Y. filamentosa 'Bright Edge' (Adams Needle) · Y. filamentosa 'Golden Sword' (Golden Sword Yucca) · Y. filamentosa'Hofer's Blue' (Hofer's Blue Adam's Needle) · Y. filamentosa 'Ivory Tower' (Ivory Tower Yucca) · Y. filamentosa 'Variegata' (Needle Palm) · Y. filifera (Tree Yucca) · Y. filifera 'Garland Gold' (Garland Gold Weakleaf Yucca) · Y. flaccida 'Garland Gold' (Thread Yucca) · Y. flaccida 'Gold Garland' (Gold Garland Yucca) · Y. funifera (New Mexico False Yucca) · Y. glauca (Bear Grass) · Y. glauca var. glauca (Narrowleaf Yucca) · Y. glauca var. gurneyi (Great Plains Yucca) · Y. glauca var. stricta (Great Plains Yucca) · Y. gloriosa (Moundlily Yucca) · Y. gloriosa 'Bright Star' (Spanish Dagger 'bright Star') · Y. gloriosa 'Variegata' (Variegated Soapwort) · Y. grandiflora (Large-Flowered Yucca) · Y. guatemalensis (Bluestem Yucca) · Y. harrimaniae (Spanish Bayonet) · Y. harrimaniae var. harrimaniae (Harriman's Spanish Bayonet) · Y. harrimaniae var. neomexicana (New Mexico Spanish Bayonet) · Y. harrimaniae var. sterilis (Spanish Bayonet) · Y. karlsruhensis (Karlsruh Yucca) · Y. louisianensis (Gulf Coast Yucca) · Y. nana (Dwarf Yucca) · Y. necopina (Brazos River Yucca) · Y. pallida (Pale Yucca) · Y. peninsularis (Yucca) · Y. recurvifolia 'Banana Split' (Curve-Leaf Yucca) · Y. recurvifolia 'Hinvargas' (Curve-Leaf Yucca) · Y. recurvifolia 'Margaritaville' (Curve-Leaf Yucca) · Y. recurvifolia 'Monca' (Banana Split® Soft Leaf Yucca) · Y. reverchonii (Plateau Yucca) · Y. rigida (Blue Yucca) · Y. rostrata (Big Bend Yucca) · Y. rupicola (Twistedleaf Yucca) · Y. schidigera (Mojave Yucca) · Y. schottii (Mountain Yucca) · Y. tenuistyla (Whiterim Yucca) · Y. thompsoniana (Beaked Yucca) · Y. torreyi (Great Yucca) · Y. treculeana (Don Quixote's Lace) · Y. treculeana Carr. var. succulenta McKelvey (Don Quixote's Lace) · Y. treculeana var. succulenta (Don Quixote's Lace) · Y. treculeana var. treculeana (Don Quixote's Lace) · Y. valida (Datilillo) · Y. whipplei (Chaparral Yucca) · Y. whipplei intermedia (Chaparral Yucca) · Y. whipplei var. caespitosa (Chaparral Yucca) · Y. whipplei var. whipplei (Chaparral Yucca) · Y. whipplei whipplei var. whipplei (Chaparral Yucca) · Y. × karlsruhensis (Karlsruh Yucca)
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Accessed through GBIF Data Portal December 01, 2007:
- Biodiversity Heritage Library NamebankID: 2662741
- Catalogue of Life Accepted Name Code: Kew-291785
- Global Biodiversity Information Facility Taxonkey: 13754851
- Globally Unique Identifier: urn:lsid:ipni.org:names:543703-1
- GRIN Nomen Number: 42153
- Integrated Taxonomic Information System (ITIS) Taxonomic Serial Number (TSN): 43142
- International Plant Names Index (IPNI) ID: 1189808-1
- U.S.D.A. Plant Symbol: YUGLG
- Zipcode Zoo Species Identifier: 67012