Agrostis blasdalei |
Agrostis hallii |
|
---|---|---|
Blasdale bentgrass, Blasdale's bent, Blasdale's bent grass |
Hall's bent, Hall's bent grass |
|
Habit | Plants perennial; forming dense, stiff clumps, not rhizomatous or stoloniferous. | Plants perennial; rhizomatous, rhizomes to 50 cm, not stoloniferous. |
Culms | 6-30 cm, decumbent to erect. |
17-100 cm, erect. |
Leaves | 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. |
mostly cauline or somewhat basally concentrated; sheaths smooth; ligules 2.3-7 mm, dorsal surfaces scabrous, apices acute, usually lacerate; blades 6-20 cm long, 2-5 mm wide, flat. |
Panicles | 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. |
7-22 cm long, 1.5-5.5(7) cm wide, lanceolate to narrowly ovate, more or less open to dense, lowest node with 2-15 branches; branches scabridulous, ascending to more or less appressed, mostly branching at or above midlength, some branching near the base, lower branches 1-5 cm; pedicels 0.5-6 mm. |
Spikelets | lanceolate to narrowly ovate, greenish to purplish. |
lanceolate, yellow-green, often tinged with purple. |
Glumes | 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. |
equal to subequal, 2.5-4 mm, 1-veined, scabrous to scabridulous on the midvein, at least distally, sometimes also sparsely scabridulous over the back, acute to acuminate; callus hairs (0.8)1-2 mm, abundant, conspicuous; lemmas 2-3 mm, smooth, translucent to opaque, 5-veined, veins prominent at least distally, apices acute, entire or erose, sometimes toothed, teeth to about 0.2 mm, unawned; paleas absent, or to 0.2 mm and thin; anthers 3,1.5-2.3 mm. |
Caryopses | 1-1.5 mm; endosperm liquid. |
1.5-2 mm. |
2n | = 42. |
= 42. |
Agrostis blasdalei |
Agrostis hallii |
|
Distribution |
CA
|
CA; OR; WA
|
Discussion | 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.) |
Agrostis hallii is primarily coastal, growing in open areas of oak and coniferous forests in Oregon and California. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 24, p. 656. | FNA vol. 24, p. 653. |
Parent taxa | Poaceae > subfam. Pooideae > tribe Poeae > Agrostis | Poaceae > subfam. Pooideae > tribe Poeae > Agrostis |
Sibling taxa | ||
Synonyms | A. blasdalei var. marinensis | |
Name authority | Hitchc. | Vasey |
Web links |