Yucca baccata var. brevifolia

L. D. Benson & R. A. Darrow

Amer. J. Bot. 30: 234. 1943.

Common names: Thornber yucca
Basionym: Yucca brevifolia Schott ex Trelease Rep. (Annual) Missouri Bot. Gard. 13: 100, plates 57–59. 1902, Yucca treleasei J. F. Macbride 1918
Synonyms: Yucca arizonica McKelvey Yucca confinis McKelvey Yucca thornberi McKelvey
Treatment appears in FNA Volume 26. Treatment on page 427.

Plants caulescent. Stems 1–24, aerial, often branched, some reaching 2 m. Leaf margins filiferous. Inflorescences arising almost completely within to mostly extending beyond rosettes; peduncle to 0.3 m.


Phenology: Flowering spring–early summer.
Habitat: Hills, mesas, flats in Sonoran Desert, desert grasslands, oak woodlands, 500–2000 m

Distribution

V26 875-distribution-map.jpg

Ariz., N.Mex., Mexico (Sonora)

Discussion

Selected References

None.

Lower Taxa

None.

"thick" is not a number. "thin" is not a number."dm" is not declared as a valid unit of measurement for this property. "dm" is not declared as a valid unit of measurement for this property.

longitudinal +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
glandular-pubescent +  and glandular +
sharp-pointed +
William J. Hess +  and R. Laurie Robbins +
L. D. Benson & R. A. Darrow +
Yucca brevifolia +  and Yucca treleasei +
elliptic +, ovate +, oblanceolate +, lanceolate +  and linear +
expanded +
fleshy +  and rigid +
reflexed +, erect +  and ascending +
scale-like +
Thornber yucca +
Ariz. +, N.Mex. +  and Mexico (Sonora) +
elongated +
flattened +
0.32 cm3.2 mm <br />0.0032 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
broadened +
tinged with purple +  and cream-colored +
4.5 cm45 mm <br />0.045 m <br /> (13 cm130 mm <br />0.13 m <br />) +
5 cm50 mm <br />0.05 m <br /> (13 cm130 mm <br />0.13 m <br />) +
indehiscent +
5 cm50 mm <br />0.05 m <br /> (23 cm230 mm <br />0.23 m <br />) +
elongate +
succulent +  and fleshy +
4 cm40 mm <br />0.04 m <br /> (7.5 cm75 mm <br />0.075 m <br />) +
Hills, mesas, flats in Sonoran Desert, desert grasslands, oak woodlands, 500–2000 m +
pubescent +  and glabrous +
30 cm300 mm <br />0.3 m <br /> (100 cm1,000 mm <br />1 m <br />) +
glaucous +  and scabrous +
concavo-convex +
long-lived +  and annual +
dentate +, serrulate +  and entire +
denticulate +  and entire +
6-lobed +
0.7 cm7 mm <br />0.007 m <br /> (?) +  and 1.2 cm12 mm <br />0.012 m <br /> (?) +
not +  and articulate +
0 cm0 mm <br />0 m <br /> (30 cm300 mm <br />0.3 m <br />) +
campanulate +
semisucculent +
Flowering spring–early summer. +
4.5 cm45 mm <br />0.045 m <br /> (8 cm80 mm <br />0.08 m <br />) +
4-5(-7) times longer than broad +
oblong-cylindrical +  and obovoid +
0.7 cm7 mm <br />0.007 m <br /> (?) +  and 1.2 cm12 mm <br />0.012 m <br /> (?) +
Amer. J. Bot. +
0 cm0 mm <br />0 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
obovate +
Illustrated +
exserted +  and included +
1 +  and 24 +
0 cm0 mm <br />0 m <br /> (200 cm2,000 mm <br />2 m <br />) +
white;pale green +
1 +  and 3 +
list +  and count +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
collar-like +
white +  and dark green +
exserted +  and included +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Yucca arizonica +, Yucca confinis +  and Yucca thornberi +
Yucca baccata var. brevifolia +
Yucca baccata +
variety +
whitish;cream or tinged slightly with green or tinged slightly with purple +
aboveground +  and subterranean +
polygamodioecious +, dioecious +, monoecious +, polycarpic +  and monocarpic +
small;gigantic +
petal-like +