Sporobolus cryptandrus |
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sand drop-seed, sporobole a fleurs cachees |
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Habit | Plants perennial; cespitose, not rhizomatous, bases not hard and knotty. |
Culms | 30-100(120) cm tall, 1-3.5 mm thick, erect to decumbent. |
Sheaths | rounded below, glabrous or scabridulous, margins sometimes ciliate distally, apices with conspicuous tufts of hairs, hairs to 4 mm; ligules 0.5-1 mm; blades (2)5-26 cm long, 2-6 mm wide, flat to involute, glabrous abaxially, scabridulous to scabrous adaxially, margins scabridulous; flag blades nearly perpendicular to the culms. |
Panicles | 15-40 cm long, 2-12(14) cm wide, longer than wide, initially contracted and spikelike, ultimately open and narrowly pyramidal; rachises straight, erect; lower nodes with 1-2(3) branches; primary branches 0.6-6 cm, appressed, spreading, or reflexed to 130° from the rachis, without spikelets on the lower 1/8 – 1/4; lower branches longest, included in the uppermost sheath; secondary branches appressed; pulvini glabrous; pedicels 0.1-1.3 mm, appressed, glabrous or scabridulous. |
Spikelets | 1.5-2.5(2.7) mm, brownish, plumbeous, or purplish-tinged. |
Glumes | unequal, linear-lanceolate to ovate, membranous; lower glumes 0.6-1.1 mm; upper glumes 1.5-2.7 mm, at least 2/3 as long as the florets; lemmas 1.4-2.5(2.7) mm, ovate to lanceolate, membranous, glabrous, acute; paleas 1.2-2.4 mm, lanceolate, membranous; anthers 0.5-1 mm, yellowish to purplish. |
Fruits | 0.7-1.1 mm, ellipsoid, light brownish to reddish-orange. |
2n | = 36, 38, 72. |
Sporobolus cryptandrus |
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Distribution |
AR; AZ; CA; CO; CT; GA; IA; ID; IL; IN; KS; KY; LA; MA; ME; MI; MN; MO; MS; MT; NC; ND; NE; NH; NJ; NM; NV; NY; OH; OK; OR; PA; RI; SC; SD; TN; TX; UT; VA; VT; WA; WI; WV; WY; AB; BC; MB; ON; QC; SK
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Discussion | Sporobolus cryptandrus is a widespread North American species, extending from Canada into Mexico. It grows in sandy soils and washes, on rocky slopes and calcareous ridges, and along roadsides in salt-desert scrub, pinyon-juniper woodlands, yellow pine forests, and desert grasslands. Its elevational range is 0-2900 m. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 25, p. 129. |
Parent taxa | Poaceae > subfam. Chloridoideae > tribe Cynodonteae > Sporobolus |
Sibling taxa | |
Synonyms | S. cryptandrus subsp. fuscicolus, S. cryptandrus var. fuscicolor |
Name authority | (Torr.) A. Gray |
Web links |
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