Nolina texana

S. Watson

Proc. Amer. Acad. Arts 14: 248. 1879

Common names: Texas sacahuiste bunchgrass
Synonyms: Nolina erumpens var. compacta Trelease Nolina texana var. compacta (Trelease) I. M. Johnston
Treatment appears in FNA Volume 26. Mentioned on page 420.
Click plate for higher resolution version.
Illustrator: Bee F. Gunn
Plants acaulescent, cespitose; rosettes from vertical, subterranean branched caudices. Leaf blades wiry, stiff, triangular, slightly concavo-convex toward base, 40–90 cm × 2–4(–7) mm, not glaucous; margins entire, rarely remotely serrate with widely separated, noncartilaginous teeth, tips dying; inflorescence leaf blades curling distally, 10–50 cm. Scape curling distally, 0.5–2 dm. Inflorescences paniculate, rarely purple, 2.5–7 dm × 5–17 cm, held completely or partially within rosettes; main rachis and divisions thick, rigid, lateral branches ascending; bracts persistent, to 10–40 cm; bractlets laciniate, 1–2 mm. Flowers: tepals yellow-green, 2.5–3.5 mm; fertile stamens: filaments 0.9–1.4 mm, anthers 0.8–1 mm; infertile stamens: filaments 0.6–0.8 mm, anthers 0.4–0.5 mm; fruiting pedicel ascending, thick, articulate near base, noticeably dilated into perianth, proximal to joint 2.5–6 mm, distal to joint 1.5–2 mm. Capsules thin-walled, inflated, 3–4 × 4.5–5.5(–8) mm. Seeds closely invested in capsules, rounded, bursting ovary walls, 2.6–3.4 mm diam. 2n = 38.

Phenology: Flowering late winter–early spring.
Habitat: Rocky hillsides, limestone, granite, grasslands, shrublands
Elevation: 200–2000 m

Distribution

V26 860-distribution-map.jpg

N.Mex., Tex., n Mexico.

Discussion

Nolina texana is centered primarily on the Edwards Plateau west through the trans-Pecos region of Texas. Nolina texana </i>var.<i> compacta is not recognized as distinct from </i>var.<i> texana. They have the same distributions. Variety compacta has compact inflorescences with functionally pistillate flowers, which is typical of the functionally pistillate plants of </i>var.<i> texana. Those plants with elongate secondary branches have functionally staminate flowers and are characteristic of both varieties. The dark, round seeds are quite distinct in the open fruit chambers on inflorescences hidden within the basal leaves. Some plants from the high plains of eastern New Mexico, northwestern Oklahoma, and southern Colorado were considered to be N. texana (see 7. N. greenei). Further study of these populations may help determine if they truly are a part of this complex.

References

None.

Lower Taxa

No lower taxa listed.