19 



20 



PANICUM CRUS-GALLI L. 



Ft. Yuma, Cal. (Or 20S5) ; Baja. 

 PANICUM DICHOTOMUM L. 



San Diego Oo (Or 540). 

 PANICUM SANGUINALE L. 



Visalia, Cal.; Arizona. 

 PANICUM URVILLEANUM Kth. • 



Colorado Desert; Arizona; Chili. 

 PAPPOPHORUM WRIGHTII S. Wats. 



Calmalli (Orcutt). 



Genus PASPALUM Linnaeus. 



PASPALUM DISTICHUM L. 



Jamaica to. Cal.; San Diego Co (Or 508). 

 PASPALUM PUBLIFLORUM Rupt. 



Southern California to Texas. 



Genus PHALARIS Linnaeus, 



PHALARIS ARUNDINACEA L. 



Oregon; Arctic Am; Atlantic; Mexico. 

 PHALARIS CANARIENSIS L. 



Cruz; S D; Baja! A widely naturalized 

 weed. 



S D Co; Cruz; Baja (Or 525); Arizona 

 PHALARIS INTERMEDIA Bosc. 

 Variety ANGUSTA Chapman. 



San Diego (Or 528) ; Florida. 

 PHALARIS LEMMONI Vasey. 



Arizona; California. 



Genus PHLEUM Linnaeus. 



PHLEUM ALPINUM L. 



Alpine regions of Europe, Asia, and N A 

 PHLEUM PRATENSE L. 



Europe; widely naturalized. 



Genus PHRAGMITES Trin. 



PHRAGMITES COMMUNIS Trin. 



S D Co (Or 576); San Gregorio, Baja(Br) 

 PHRAGMITES VULGARIS B. 



Europe; Mohave (Coville). 



Genus POA Linnaeus. 



POA ANNUA L. 



Santa Cruz Island (Br). 

 POA BIGELOVII Vasey and Scribner. 



S D mts! Baja; Texas; Colo.; Utah. 

 POA UNILATERALISM Scribner. 



Vasey, grasses Pac Slope 2 t 85. ■ 



S F; San Bernardino (Parish). 



Parish, Ervthea 3:59.— Bear. 

 POA FENDLERIANA Vasey. 



S Ber; S F; Colo.; N. M. ; Mexico. 

 POA HOWELLII Vasey and Scribner. 



Cruz; Oregon. 

 Variety CHANDLER I Davy. 



"Chandler's Meadow Grass. Stems 3.5- 

 5.5 cm high: lvs smooth; sheaths some- 

 what inflated; ligule scarious, w, trun- 

 cate, dentate, 2-4 mm long; blades flat, 

 acute, 3-3.5 cm long, 5 mm wide; panicle 

 but little exserted (at least in young 

 plants), 7-13 cm long; branches sparsely 

 scabrid, remote, the lowest in whorls of 

 3-5, the whorls 2.5-3.5 cm apart; lowest 

 branches very unequal, 1.5-7 cm long, 

 spikelet-bearing only on the upper half: 

 spikelets 4.5-5 mm long, 2-fl'd; empty 

 glumes minutely puberulent and serrate, 

 broad, the lower 2 mm long, acute, 1- 

 nerved, upper about 3 mm long; fl'ng 

 glumes scabrid, 3 mm long, acute, spar- 

 ingly webbed at base with a long thin 

 web; stamens 3, anthers 1.5 mm long."— 

 Davy, Univ Cal pub bot 1:60. Siskiyou Co; 

 Jac (Chandler 1703). 

 POA TENUTFOLIA Nuttall. 



Chollas (Or 1071). Baja (Or 1148, var. 

 rubra). 



Genus POLYPOGAN Desf. 



POLYPOGON LITTORALIS Smith. 



McClatchie, Erythea 2:77. Pasadena. 

 POLYPOGON MONSPELIENSIS Desf. 



Chollas (Or 506); Arizona; N. M. ; Mo- 

 have; Cruz; Rosa.; Guadalupe. Widely 

 naturalized. 

 SPARTINA GLABRA Muhl. 



A glabrous, erect, and often stout 

 salt-marsh grass 6-24 dm high with 

 long, flat, or involute leaves, few or 

 many erect, usually appressed spikes 

 and glabrous spikelets. Culms simple, 

 sometimes 2 cm in diameter below; 

 sheaths glabrous, the lower ones 

 crowded and imbricate, distichous; li- 

 gule a ciliate ring about 2 mm long; 

 leaf-blades 5-7 dm long, 1-1.5 cm wide, 

 usually flat but sometimes involute, 

 tapering to a long involute tip, gla- 

 brous throughout. Panicles 2-4 . dm 

 long. Spikelets densely imbricate, 10-14 

 mm long; empty glumes glabrous, or 

 both sparingly scabrous on the keel, 

 the first 6-S mm long, the second 10-14 

 mm in length; flowering glume 8-10 

 mm long. Palea somewhat exceeding 

 the glume and thinner in texture. 

 Salt marshes along the coast from 

 Virginia to Florida and Texas. San 

 Diego, Cal. '(Orcutt). 

 SPARTINA FOLIOSA Trin. 



A glabrous perennial with numerous, 

 rather short flat leaves, densely flow- 

 ered spikes and usually very strongly 

 aculeolate-ciliate keeled empty glumes. 

 Culms simple, about 1 cm in diameter 

 below. Sheaths crowded and overlap- 

 ping, especially above; ligule a ciliate 

 ring about .2 mm long; leaf-blades 2-6 

 dm long, about 1 cm wide, glabrous 

 throughout, plane or sometimes invo- 

 lute in drying, tapering into a slender 

 involute tip. Panicle 10-15 cm long, al- 

 most cylindrical, the spikes densely 

 flowered, 2-5 cm long, appressed, pri- 

 mary, and secondary ones glabrous. 

 Spikelets imbricate, 12-14 mm long, 

 glabrous throughout or the . empty 

 glumes usually very strongly aculeo- 

 late-ciliate on the keels, the first nar- 

 row, 7-8 mm long, the second, 12-14 mm 

 in length; flowering glume nearly as 

 long as the second empty glume, 

 slightly shorter than palea. glabrous 

 throughout or sometimes ciliate on the 

 margins below. Salt marshes along 

 the coast, San Francisco, Cal., San 



