Agrostis densiflora |
Agrostis blasdalei |
|
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California bent, California bent grass |
Blasdale bentgrass, Blasdale's bent, Blasdale's bent grass |
|
Habit | Plants perennial; not rhizomatous or stoloniferous. | Plants perennial; forming dense, stiff clumps, not rhizomatous or stoloniferous. |
Culms | 9-85 cm, erect, sometimes decumbent at the base, sometimes rooting at the lower nodes, usually with 4-7 nodes. |
6-30 cm, decumbent to erect. |
Leaves | basal and cauline; sheaths smooth or scabrous; ligules 1-4.8(7.5) mm, dorsal surfaces scabrous, apices truncate to obtuse, erose-lacerate, sometimes ciliolate; blades 2-12 cm long, 2-10 mm wide, upper blades broader than those below, flat. |
forming a dense, bristly basal tuft; ligules 0.7-2.3 mm, dorsal surfaces scabridulous, apices truncate to obtuse, often erose, sometimes lacerate or ciliolate; blades 2-5 cm long, less than 1 mm wide, soon becoming tightly inrolled and rigid. |
Panicles | 2-10 cm long, 0.5-2 cm wide, narrow and spikelike to dense, lobed-lanceolate, bases exserted or enclosed by the upper sheaths at maturity; branches to 1.5 cm, scabrous, appressed, branching at the base and mostly hidden by the spikelets; pedicels about 0.4-3 mm. |
2-8 cm long, 0.2-0.6 cm wide, narrowly cylindric, spikelike, dense, occasionally interrupted near the base, the base often enclosed by the upper sheaths; branches to 2 cm, scabrous, strongly appressed, hidden by the spikelets; pedicels 0.5-7 mm. |
Spikelets | lanceolate to narrowly ovate, yellowish, sometimes tinged with purple, or greenish purple. |
lanceolate to narrowly ovate, greenish to purplish. |
Glumes | generally equal, 2-3.3 mm, 1-veined, densely scabrous, aculeolate on the veins, narrowly acute to acuminate or somewhat mucronate, mucros to about 0.5 mm; callus hairs to 0.3 mm, usually dense; lemmas 1.5-2.1 mm, smooth or scabridulous, translucent, (3)5-veined, veins prominent to obscure, sometimes prominent only distally, apices acute to obtuse, veins usually extended as teeth up to 0.3 mm, unawned or awned from above midlength, awns to 3.5 mm, straight, readily deciduous; paleas 0.3-0.7 mm, thin; anthers 3, 0.5-2 mm. |
1.8-4 mm, often 3-veined, midveins scabrous to smooth, acute to acuminate; calluses glabrous; lemmas 1.5-2.5 mm, 5-veined, veins obscure or prominent distally, extending as teeth to 0.2 mm, unawned or awned from above midlength, awns to 1.2 mm, usually scarcely exceeding the lemma apices, straight; paleas to 0.3 mm, thin; anthers 3, 0.7-2 mm. |
Caryopses | 1-1.5 mm; endosperm solid. |
1-1.5 mm; endosperm liquid. |
2n | = 42. |
= 42. |
Agrostis densiflora |
Agrostis blasdalei |
|
Distribution |
CA; OR
|
CA
|
Discussion | Agrostis densiflora is endemic to coastal Oregon and California. It grows in sandy soils, on cliffs, and in scrublands. It appears to be related to A. exarata (see previous), and hybridizes with A. blasdalei (p. 656). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Agrostis blasdalei is a xerophytic species that is known only from Mendocino to Santa Cruz counties, California, where it grows on coastal cliffs and dunes and in shrublands. It hybridizes with A. densiflora (p. 651). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 24, p. 651. | FNA vol. 24, p. 656. |
Parent taxa | Poaceae > subfam. Pooideae > tribe Poeae > Agrostis | Poaceae > subfam. Pooideae > tribe Poeae > Agrostis |
Sibling taxa | ||
Synonyms | A. clivicola var. punta-reyensis, A. californica | A. blasdalei var. marinensis |
Name authority | Vasey | Hitchc. |
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