Agrostis densiflora

Vasey
Common names: California bent
Endemic
Synonyms: Agrostis clivicola var. punta-reyensis Agrostis californica
Treatment appears in FNA Volume 24. Treatment on page 651.
Please click on the illustration for a higher resolution version.
Illustrator: Sandy Long

Copyright: Utah State University

Plants perennial; 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. 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. 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. Spikelets lanceolate to narrowly ovate, yellowish, sometimes tinged with purple, or greenish purple. 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. Caryopses 1-1.5 mm; endosperm solid. 2n = 42.

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).

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Agrostis densiflora"
membranous +  and scarious +
not penicillate +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
awned +, truncate +  and entire +
Acute (?) +  and Obtuse (?) +
M.J. Harvey +
1 (?) +  and 3 (?) +
straight +
basal +  and terminal +
geniculate +
0 cm0 mm <br />0 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
rounded +  and keeled +
pseudopetiolate +  and branching +
enclosed +  and exserted +
swelling +
2 cm20 mm <br />0.02 m <br /> (12 cm120 mm <br />0.12 m <br />) +
not evident +
scabridulous +
cross +, linear +  and narrowly lanceolate +
2mm;10mm +
spikelike +
0 cm0 mm <br />0 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
hairy +  and glabrous +
California bent +
9 cm90 mm <br />0.09 m <br /> (85 cm850 mm <br />0.85 m <br />) +
not woody +
Calif. +  and Oreg. +
1/4 +  and 1/3 +
liquid +, soft +  and hard +
capillary +
pistillate +  and staminate +
sometimes longer +
sterile +  and bisexual +
compressed +
reduced +
(1)1.3-2(4) times longer than +
subtending +
mucronate +, narrowly acute +  and acuminate +
unequal +
0.2 cm2 mm <br />0.002 m <br /> (0.33 cm3.3 mm <br />0.0033 m <br />) +
uncinate +
diffuse +  and dense +
cauline +  and basal +
pubescent +  and glabrous +
scabridulous +  and smooth +
lanceolate +  and ovate +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.21 cm2.1 mm <br />0.0021 m <br />) +
membranous +
0.1 cm1 mm <br />0.001 m <br /> (0.48 cm4.8 mm <br />0.0048 m <br />) +
membranous +
inconspicuous +
lanceolate +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (?) +
concealed +  and prominent +
4 +  and 7 +
2 +  and 1 +
well-developed +
2-keeled +
minute +  and subequal +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
2cm +  and 10cm +
lobed-lanceolate +  and spikelike +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
dry +  and fleshy +
not prolonged +
hairy +  and glabrous +
scabrous +  and scabridulous +
tinged +  and yellowish +
greenish purple +  and purple +
1 +  and 60 +
lanceolate +  and narrowly ovate +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
1 (?) +  and 3 (?) +
simple +  and compound +
2 (?) +  and 3 (?) +
Agrostis clivicola var. punta-reyensis +  and Agrostis californica +
Agrostis densiflora +
Agrostis +
species +
membranous +
2 +  and 5 +
0 cm0 mm <br />0 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
not convergent +
prominent +  and obscure +
scabrous +  and scabridulous +
extended +
stoloniferous +  and not rhizomatous +
aquatic +  and terrestrial +