No. 30. 

 AGROSTIS DENSIFLORA Vasey, Contr Nat, Herb. iii. 702. 



Plant annual, tufted, with fibrous roots. 



Culm erect or geniculate at the lower nodes, rather stout, smooth, naked above, 6 

 to 12 inches high. 



Leaves from the base few and short. Leaves of culm 2 or 3; sheaths rather loose, 

 striate, nearly smooth, crowded below, longer than the internodes; blades flat or 

 folded, hispidulous on both sides, striate, rather thick and rigid, erect, tapering to the 

 apex, 2 to 3 lines wide below, 2 to 4 inches long; ligule membranaceous, prominent, 

 obtuse, decurrent, 2 lines long. 



Inflorescence a rather dense or slightly interrupted, spicate panicle 2 to 3 inches 

 long and ^ to £ inch thick; rays glomerate, branching, scabrous, bearing crowded 

 spikelets on short, scabrous pedicels. 



gpikelets 1-flowered, turgid, 1£ lines long; empty glumes nearly equal (second 

 slightly shorter), lanceolate, acuminate, carinate, membranaceous, rigid, hispidulous 

 throughout; lower glume hispid on the keel, 1-nerved, 1^ lines long; floral glume ob- 

 long, truncate, minutely toothed, thin-membranaceous, smooth except a minute tuft 

 of white hairs on the ventral side at base, 5-nerved, nearly 1 line long, with or with- 

 out a slender dorsal awn near the apex 1 line or less long; palet wanting; grain 

 spindle-shaped, acute at each end, yellow, opaque, § line long, falling free. 



Plate XXX; 1 and 2, typical specimens, full size; 3. a depauperate form; a, 

 spikelet enlarged 10 times; b, empty glumes; c, floral glume side view; d, same back 

 view; e, unawned floral glume. 



Santa Cruz, California. 



