Ptilagrostis kingii

(Bol.) Barkworth
Common names: King's ptilagrostis Sierra ptilagrostis
Endemic
Synonyms: Oryzopsis kingii
Treatment appears in FNA Volume 24. Treatment on page 143.

Culms 15-38 cm tall, 0.4-0.8 mm thick. Basal ligules 1-2 mm, acute; upper ligules to 2.5 mm; blades filiform, about 0.3 mm in diameter. Panicles 6-10 cm, loosely contracted; branches ascending to appressed. Glumes 3-4.5 mm; florets 2.8-4.2 mm; calluses 0.3-0.7 mm; lemmas with 0.1-0.4 mm lobes; awns 10-14 mm, scabridulous, not hairy, weakly once or twice-geniculate; anthers 0.5-1.5 mm, penicillate. Caryopses 1.5-2.3 mm. 2n = 11.

Discussion

Ptilagrostis kingii grows along damp streambanks and wet meadows of the Sierra Nevada, at elevations from 2700-3500 m. It differs from most species in the genus in its scabridulous, rather than plumose, awns and short lemma lobes.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number."prolonged" is not a number.

... more about "Ptilagrostis kingii"
membranous +  and scarious +
penicillate +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
awned +, bifid +, bilobed +  and entire +
Rounded (?) +, Lobed (?) +  and Acute (?) +
Mary E. Barkworth +
(Bol.) Barkworth +
twisted +  and not branched +
1 (?) +  and 3 (?) +
subterminal +  and eccentric +
not hairy +
scabridulous +
2 times-geniculate +
1 cm10 mm <br />0.01 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
keeled +  and rounded +
pseudopetiolate +  and branching +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
0.3 cm3 mm <br />0.003 m <br /> (?) +
not evident +
filiform +
straight +  and flexuous +
ascending;appressed +
hirtellous +  and glabrous +
capillary +
well-developed +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
King's ptilagrostis +  and Sierra ptilagrostis +
not branching +
perennial +  and annual +
15 cm150 mm <br />0.15 m <br /> (38 cm380 mm <br />0.38 m <br />) +
not woody +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
0 +  and 1/3 +
liquid +, soft +  and hard +
capillary +
pistillate +  and staminate +
sometimes longer +
2.8mm +  and 4.2mm +
purplish +  and hyaline +
1-10-veined +
subtending +
narrowly lanceolate +  and ovate +
subequal +
0.3 cm3 mm <br />0.003 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
membranous +
not keeled +
0 cm0 mm <br />0 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
solid +  and hollow +
basally concentrated +  and evenly distributed +
ovate +, rectangular +  and lanceolate +
membranous +
rounded +  and acute +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
membranous +
membranous +
inconspicuous +
lanceolate +
not overlapping +
2 +  and 1 +
well-developed +
slightly longer +
reduced +
6 cm60 mm <br />0.06 m <br /> (10 cm100 mm <br />0.1 m <br />) +
dry +  and fleshy +
not prolonged +
smooth to somewhat +
1 +  and 60 +
unisexual +  and bisexual +
laterally compressed +  and terete +
0.34 cm3.4 mm <br />0.0034 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
1 (?) +  and 3 (?) +
simple +  and compound +
2 (?) +  and 3 (?) +
Oryzopsis kingii +
Ptilagrostis kingii +
Ptilagrostis +
species +
membranous +
inconspicuous +
plant +  and cespitose +
aquatic +  and terrestrial +
12 +, 11 +, 10 +, 8 +  and 7 +