MANUAL OF THE GRASSES OF THE UNITED STATES 



351 



Figuke 489 



-Agrostis scabra. Panicle, X 1; spikelet and floret, X 10. (Barkley and Rose 

 1881, Mont.) 



blades from lax to stiffly upright, 

 corresponding to the culms, 10 to 20 

 cm. long, 1 to 6 mm. wide; panicle 

 pale to tawny, open, oblong, the 

 branches verticillate, mostly lax, as- 

 cending, branching about the mid- 

 dle; spikelets 2 to 3.2, mostly 2.2 

 to 2.7 mm. long, the pedicels spread- 

 ing, but the spikelets sometimes some- 

 what aggregate towards the ends of 

 the branchlets; glumes acute or acumi- 

 nate, the first slightly longer; lemma 

 1.5 to 2 mm. long, rarely awned (A. 

 perennans forma chaetophora Fernald); 

 palea obsolete or nearly so. 01 — 

 Open ground, old fields, open woods, 

 in rather dry soil from sea level to 

 mountain tops, flowering in late 

 summer or autumn, Quebec to Minne- 

 sota, south to Florida and eastern 

 Texas; Mexico. Extremely variable, 

 in dry open ground erect and rather 

 stout; in shady places weak, with lax 

 pale panicle and divaricate branch- 



lets and spikelets 2 mm. long (A. 

 perennans var. aestivalis Vasey) . Inter- 

 grades with the following, the inter- 

 mediate specimens (A. scribneriana 

 Nash) rather numerous in the East- 

 ern States. 



33. Agrostis altfssima (Walt.) 

 Tuckerm. (Fig. 491, B.) Culms most- 

 ly stouter than in the preceding, 

 erect or ascending; panicle branches 

 usually ascending, the spikelets more 

 or less aggregate toward the ends; 

 spikelets 2.3 to 3.7, mostly 2.7 to 

 3.5 mm. long. % — Mostly in 

 marshy ground, pine barren bogs, 

 and wooded swamps, coastal plain, 

 New Jersey and Maryland to Ala- 

 bama and Mississippi. 



34. Agrostis oregonensis Vasey. 

 Oregon redtop. (Fig. 492.) Culms 

 60 to 90 cm. tall; blades 2 to 4 mm. 

 wide; panicle oblong, 10 to 30 cm. 

 long, open, the branches verticillate, 

 rather stiff and ascending, numerous 



