familyPoaceae
subfamilyPoaceae subfam. Pooideae
tribePoaceae tribe Poeae
genusCalamagrostis
speciesCalamagrostis porteri
subspeciesCalamagrostis porteri subsp. insperata
Calamagrostis porteri subsp. insperata
Common names: Bartley's reedgrass
Synonyms: Calamagrostis insperata
Treatment appears in FNA Volume 24. Treatment on page 723.
Culms (85)90-120 cm. Sheaths smooth; collars glabrous; ligules (2)3-4(6) mm; blades (12)16-28(30) cm long, (2)6-8(12) mm wide, glaucous on both surfaces. Panicles (11)14-18(22) cm long, (1.5)2-3(3.5) cm wide; branches (2.5)5-7(7.5) cm. Spikelets (4)5(6) mm; rachilla prolongations with 1.5-2(3) mm hairs. Callus hairs 2(3) mm, 0.5-0.7 times as long as the lemmas; lemmas 3(4) mm, 1(2) mm shorter than the glumes; awns 3-3.5 mm, attached to the lower 1/10 – 3/10 of the lemmas; anthers 2-2.5 mm. 2n = 56.
Discussion
Isolated populations of Calamagrostis porteri subsp. insperata grow from southern Missouri and Arkansas to Ohio and Kentucky. It is listed as possibly extirpated or of conservation concern in several states.
Selected References
None.
Lower Taxa
None.