.50 



UKTICACE^E. 



) 



Urtica Breweri, S. Watson, sp. hied. (72. 



U. GRACILIS, Ait. San Luis Valley. HI.) 



HuMULUS LupuLUS, L. Mountains east of the Arkansas Eiver. (53.) 



cupulifee^t:. 



QUERCUS UNDULATA, Torr. Pouclio Pass. (SIS.) 



BETULACE.E. 



Betula occidentalis, Hook. Georgetown. (841.) 



B. GLANDULOSA, Miclix. Twin Lakes, Blue River. (838, 839.) 



Alnus incana, Willd., var. glauca, Ait. (840.) 



SALICACE.E. 



■ 



Salix nigra, Marsli., var. amygdaloides, Anders. Denver. June. 



S. LONGiFOLiA, MuW., var. argtrophylla, Xutt., forma ANGUSTissniA, 



Anders. Twin Lakes and Denver. (822.) 

 S. LiviDA, Wahl., var. occidentalis, Gray(?). (821.) 

 S. CORDATA, Muhl. Georgetown. June. South Park. (825 82<'> ) 

 S. GLAUCA, L., var. sericea, Anders. (819, 829.) Exactly 523 of Hall 



and Harbour. 



S. reticulata, L. Half-Moon Creek, at 13,000 feet. (830.) 



POPITLUS TREMULOIDES. MinliT. SoTlth Park. (832.) 



4.NS, Gray. Denver j and common 



iAj; 



elsewhere along streams. (835.) 



P. BALSAMiPERA, L., var. ANGUSTIFOLIA, Watson. San Luis Vallev 

 Denver. (833,834.) •'' 



P. ANGULATA, Ait. Denver. (831.) 



COXIFEE^ (named by Josiah Hoopesj.* 



PiNUS CONTORTA, Dougl. Soutb Park. (842.) Twin Lakes. (843.) 



P. FLEXiLis, James. Twin Lakes. (845.) 



P. Balfouriana, Mur., (syn. P. aristata, Engl.) Breckenridce : hi"h 



ground. (8470 South Park. (848.) ' ^ ' « ; « 



P. MONOPHYLLA, Torr.t Valley of the Upper Arkansas. (849.) 

 P. PONDEROSA, Dougl. Tree 40 feet high and 2 feet in diamstcr. Con- 



jos Creek. 11,000 feet altitude. (983.) 

 Abies Douglasii, Lindl. Twin Lakes. (84G.) 

 JUNIPERUS ViRGiNiANA, L. A form peculiar to the Eocky Mountain 



range, with pale, glaucous leaves. Valley of the Upper Arkansas 



Eiver. (844.) 



Also cone of the AUes Menzicsii, Lindl.; and an iramalnr.- cone 

 of Finus{l). 



• See reniarks in hrst pait of report. 



1 1 here defer to Hoopes in naming this tree. It is more asualTy now, I tWiik, rcKarded 

 as r. ediilw, Engelin. ^ 7 jo 



