336 BOTANY. 



Mountains, Nevada ; also found in the Raft River Mountains, and frequent in 

 the Wahsatch ; 6,000 feet altitude. (1,121.)' 



JuNiPEEUS occiDENTALis, Hook. Fl. Bor. Amer. 2. 166. DC. Prodr. 

 16. 2. 489. A monoecious spreading shrub or tree, 10-40° high, with loose 

 reddish bark, the branches scattered, spreading, horizontal, or drooping ; 

 branchlets terete, covered with leaves; leaves in threes, scale-like, closely 

 imbricate and appressed, ovate, acute, convex on the back and marked 

 between the middle and the base with an oblong gland, finally on the older 

 branchlets becoming somewhat free and slightly spreading with an acute 

 mucronate subpungent apex, (on rapidly growing shoots often less crowded, 

 decurrent at base, the apex free and pungently long-acuminate;) sterile 

 aments 2-3" long, erect, oval, rounded or subquadrangular, scales orbicular, 

 rather flat on the back and glandular, entire ; fruit erect on short branchlets, 

 solitary, numerous, oval or obovate-globose, rather large (4-5" in diameter,) 

 green and glaucous, becoming reddish-brown, of 6 or rarely 9 scales, with a 

 short obtuse somewhat spreading or reflexed apex; seeds 2-1, ovate, acutish, 

 pale and somewhat shining, 2-3 times larger than in J. Virginiana. — Wood 

 white, the innermost heart- wood red. From Western Texas to California and 

 Oregon. Abundant throughout Nevada, though rarely over 10 or 15° high, 

 sometimes 1° or more in thickness at base ; not seen in Utah, nor is it reported 

 from Colorado ; 4,500-7,000 feet altitude. These three species probably 

 include all the forms found west of the Mississippi. (1,122.) 



LEMNACE^. 



Lemna teisulca, L. Northern States and Canada ; the Saskatchewan 

 region ; California ; New Mexico. Nevada and in the Uintas ; 5,500-6,000 

 feet altitude. Minutely puberulent and- occasionally with short scattered 

 hairs above; mostly rootless, sterile. (1,123.) 



Lemna Valdesiana, (?) {L. Torreyi, Aust.) Perhaps a thick and root- 

 less form ; found growing with the last at Summit Springs, near Battle Mount- 

 ain, Nevada; 5,500 feet altitude ; June. Barren. (1,124.) 



Lemna minor, L. From Florida to Canada and westward ; Arkansas ; 

 California ; Arizona. Truckee and Groose Creek Valleys, Nevada ; 4-6,000 

 feet altitude. July, in flower ; September. (1,125.) 



Lemna polyrehiza, L. From Florida to New England and the Sas- 

 katchewan; Arkansas; Texas. Truckee River, Nevada ; 4,000 feet altitude ; 

 barren. (1,126.) 



