BOTANY. | 157 
FESTUCA SCABRELLA, Hook, Fl. Bor.—Amer. 2, p. 252, t. 233. Hills near Tomales. Bay, Cali- 
fornia; April 19. A tall glaucous grass (2-3-feet high.) Spikelets 5-flowered and a rudiment. 
Palez scabrous. 
BrizoprruM Dovarasu, Hook. de Arn. Bot. Beech. p. 404. Poa Douglasii, Steud, Enum. Pl, 
Glum. p. 261. Sandy sea shore. Punta de los Reyes. April 17. 
MELICA POXWOIDES, Nutt. Pl. Gamb. l. c. Corte Madera, California; April 20. Spikelets 
3—4-flowered, the uppermost abortive (male or neuter.) In depauperate specimens the spikelets 
are often but 2-flowered, with rudiment. 
MELICA IMPERFECTA, Trin. Gram. Suppl. in Act. Petrop. p. 59, and Icon. Gram. t. 355; Hook. 
& Arn. Bot. Beech. p. 403, (sphalm. M. imperforata.) M. clpodioides, Nees im Tayl. Ann. 
Nat. Hist. 1 p.282; Steud. Syn. Pl. Glum. p. 291. Red-woods, April 12, (spikelets with two 
perfect flowers and a capitate rudiment; leaves glabrous;) Mark West's creek, California, 
April 30, (spikelets with a single perfect flower and a capitate rudiment ; leaves pubescent.) 
UNIOLA stricta, Torr. in Ann. Lyc. N. York, I, p. 153, & in Marcy's Rep. p. 301 & 20, Dry 
salt marshes, Indian Territory ; August. 
SESLERIA DACTYLOIDES, Nutt. Gen. I, p. 165 ; Torr. in Emory's Rep. p. 154,t.10. Llano Esta- 
cado; September. As usual, with male flowers only. We have now examined specimens of this 
grass collected in very many places, and from an extensive range of country, but haye not yet 
found it in seed, and very rarely with even abortive pistils. 
Bromus. CARINATUS, Hook. de Arn. Bot. Beech. p. 403. Mark West’s creek, April 30. As 
Hooker & Arnott truly remark, the grass is intermediate between Bromus & Ceratochloa ; but 
it is nearer the former. 
Bromus Kazurr, Gray, Man. Bot. N. States, p. 600? Var. ARISTULATUS ; glabrius culus; panicula 
debile, ramulis elongatis divergentibus, spiculis 6—7-floris; paleis minute pubescentibus, inferiore 
integro, apice brevissime aristata. Mark West's creek, California. April 30. 
Bromus CILIATUS, Linn., var. PURGANS, Gray, Man. ed. 2, p. 567. B. purgans, Linn. Moun- 
tain ravines, on the Par New Mexico ; October. 
ARUNDO PHRAGMITES, Linn. Sandy وو له‎ of the Canadian river, near the Antelope Hills ; 
September. 
Ervwus viLLosus, Muhl. Gram. p. 175; f. GLABRIUSCULUS: radice repente; culmo foliisque 
glabriusculis ; vaginis inferioribus pubescentibus; spica erecta, spiculis 2-(raro 3;) floris-glumis 
lanceolato-subulatis scabriusculis breviaristatis ; palea superiore scabra arista ipsa 3-plo longiore. 
Napa Valley, California; May 6. This grass, though apparently only a variety of E. villosus, 
is also closely related to E. Europsus. ` 
HORDEUM pratense, Huds.; Kunth, Enum. 1, p. 452. H secalinum, Schreb. H. Chilense, 
Brongn. It is also No. 2025 of Hartweg, and No. 756 of Coulter. Corte Madera, California ; 
April. Differs from our Swedish specimens of H. pratense in the lateral flowers being one- 
valved and neuter; but in this genus the awns of the neuter flowers are variable. 
SITANION ELYMOIDES, Raf. in Jour. de Phys. 89, p. 103; Steud. Syn. Pl. Glum. p. 351. 
Ægilops Hystrix, Nutt. Gen. 1, p. 86. Elymus? Sitanion, Schult. Mant. 2, p. 426. Polyan- 
therix Hystrix, Nees, in Ann. Nat. Hist. 1, p. 284; Hook. € Arn. Bot. Beech. p. 404. Elymus 
v. nov. gen. Torr. in Nicollet’s Rep. p. 165. River banks, Mokelumne Hill, California; May 
17. We restore the name given by Rafinesque to this grass, because it is the earliest. Our 
California specimens are nearly two feet high. Indeed, we have never seen the plant of so 
humble a stature as that described by Mr. Nuttall. It is a widely diffused grass, being found 
from northern Minnesota to Texas, and west of the Pacific. It is often mistaken for an Elymus. 
LEPTURUS PANICULATUS, Nutt. Gen. 1, p. 81. Llano Estacado, and plains near Galisteo, New 
Mexico; September—October. This species is remarkable for its triangular branching rachis 
and long very slender spikes. There is but a single one-flowered spikelet at each joint of the 
rachis, without any trace of a rudimentary flower. Glumes 2, opposite, contrary to the rachis, 
