Panicam. GRAMINEyE. 259 



slender branches S(jlitary or in pairs, at liist creet, then spreailini,' and when oM 

 oflon rellcxed ; spikelets U lines lunj;, ovoid to narrowly oblong, pointed and often 

 piir|ilisli, scattered, on mostly nuioh longer pedicels: neutral floret of a single palot, 

 twiiHi the length of the acute 1-ncrved lower glume; upper glume H-nerved, pointed, 

 nearly a lialf longer than the somewhat obtuse perfect Uower. — Jieichenb. 1. c., 

 t. 192. 



Uistributed throughout the State and the adjoining States and Territories. Tliis is an abundant 

 grass, mostly in sandy soil, from the Atlantic to tlie Pacific, and varies considerably at the East, 

 but tiie western si>ecimeiis are more robust and the brandies of the panicle stronger than in the 

 eastern |ilant, while tiie spikelets aie somewliat longer on shorter pedicels ; but there are no per- 

 manent differences. Of no agricultural value ; indeed it is said that animals will not touch it. 

 Tlie dry panicles break off in autumn, and are blown about liy the winds, often collecting in great 

 heaps in fence-corners, etc. 



4. P. Urvilleanum, Kunth. Culms perennial, 12 to 20 inches higli and, like 

 the wiiole plant, clothed with whitish hairs: leaves rigid, 12 to 18 inches long, 3 

 lines wide at the flat base, convolute above and ending in a very long tapering point : 

 panicle G to 10 inches long, open, the not numerous branches solitary or in pairs, 

 bearing towards their enils a few very hairy large spikelets, which are 2 to 3 lines 

 long, ovate, acute: lower glume 7-nerved, two-thirds the length of the 15-nerved 

 upper one, the nerves in both distinct and greenish : sterile Uoret staminate, with 

 two palets, the lower 15-nerved ; perfect floret oblong, smoi:)th except a fringe of long 

 silky hairs upon the margins. — liev. Gram. t. 115; Brongn. Voy. Coquille, Phau. 

 1 1 7, t. 9. 



San Diego County (Parr;/ & Lcnnuon) ; also in the State Survey collection, a single specimen, 

 without ticket ; a native of Chili. Several of the lower joints of the culm are naked, indicat- 

 ing that it grows in blowing sands. The sheaths are much crowded, the outer ones weather-worn. 

 The whole plant when young of a very pale glaucous green, when old yellowish throughout. 



•^ -t- Spikelets obtuse. 



5. P. SCOparium, Lam. Culm from a i)erennial root, G inches to 2 feet high, 

 geniculate at the lower nodes and at length branched and reclining : leaves lanceo- 

 late, 3 to 5 inches long, about G lines wide, indistinctly 9-nerved, mostly erect and 

 somewhat rigid, haii-y beneath and fringeil with spreading hairs at base ; sheaths 

 hairy : panicle 2 to 3 inches long, nearly simple, the hairy slender branches bearing 

 a ^Gw largo (1^ lines long) tumid obovate usually hairy s])ikelets : upper glume 

 9-nerved, twice or three times the length of the roundish lower one : perfect flower 

 (under a strong lens) miinitely dotted in longitudinal lines, the lower palet with a 

 transverse furrow or fold near the base. — Kncycl. iv. 714 his (tlu're is much con- 

 fusion in the paging) ; Chapin. Fl. G75. P. paKcijiovam, EH. ?; Cray, Manual, G48. 



Oregon, Pickerinij, Spaiihlinrj, Hnll, Ilour/l. Not found as yet within the State, but .so fre- 

 •lucnt ill (Jregon and elsewhere that its occiirrenee is very prol)able. It extends from New Eng- 

 land westward, also southward, where the jilant is much larger than any Oregon spcfcimens. Late, 

 in the season it blanches, taking on a variety of forms, some of which are velvety hairy. The 

 fold or crease at the base of the iierfect floret appears to have been overlooked ; it seems to be 

 quite characteristic of this species. 



G. P. dichotomum, Linn. Culm from a few inches to 2 feet high, erect and 

 simple or, late in the season, decumbent and variously branched : lower leaves 

 usually ovate, the upper linear-lanceolate, smooth or hairy or velvety : terminal 

 panicle open, ovoid, those of the branches short and often included in the sheaths ; 

 spikelets a lino long, oblong-obovate, smooth or hairy : lower glume roundish, one- 

 tliird the lengtli of the 5 - 7-nerved upper one. — P. thennale, IJolander, Proc. Calif. 

 Acad. ii. 181. 



Yosemite Valley, the Geysers, and on Lassen's Teak, at nn altitude of •fj-'ino feet. Found nil 

 over the country, and .presenting an endless variety of forms, many of which have been described 

 as species. It assumes a very different appearance after the first flowering, when it begins to 

 flower upon the numi-rous branches. Some forms smooth and shining, but all thus far collected in 

 the State are hairy. P. Ihcrmalc was described honi a densely velvety low and much branched state. 



