124 SYNOPSIS OF THE FLORA OF COLORADO. 



tive; spike dense, oblong, obtuse ; pedicels exceeding the flowers; sta- 

 mens exserted. 



Yar. OBLONGIFOLIUM, Meisn. Stem simple, 6'-2 high ; leaves glab- 

 rous, the lowest oblong, the blade 3'-S' long, l'-2' broad, scarcely decur- 

 rent by an abruptly attenuate base into a very long petiole ; spike 

 oblong, '-2' long. Hall & Harbour, 490. Gray's Peak, Dr. Smith. San- 

 gre de Cristo Pass, Brandegee. Mount Lincoln, at 13,000 feet altitude, 

 Coulter. Parry ; B. H. Smith. Twin Lakes, Porter. 



POLYGONUM DUMETORUM, L. Caiion City, Brandegee. Foot-hills 

 near Denver, Coulter. 



SHEPHERDIA CANADENSIS, L. Hall & Harbour, 506. Twin Lakes, 

 Coulter. 

 SHEPHERDIA ARGENTEA, Kutt. Green Horn Kiver, Greene, 1873. 



SANTAI.ACEJE. 



COMANDRA PALLIDA. DC. Prod. 14, p. 666. Steins from a woody 

 caudex. herbaceous, striate, erect, 6'-W' high, branched above ; leaves 

 alternate, bluish, somewhat punctate on the margin, lower elliptical- 

 oblong, mucronate-acute, 8"-12" long, 2 // -3 // wide, uppermost usually 

 linear-lanceolate, S"-!!)" long, about V wide ; bracts linear-lanceolate, 

 2". long; pedicels slender, V long; flower as in C. umbellata, but the 

 lobes more papillose-velvety, especially on the margin and within ; 

 calyx-lobes erect, spreading; fruit 3" in diameter with a subfleshy 

 epicarp. Hall & Harbour, 507 ; Meehan. Saint Train Canon, Coulter. 



ARCEIJTHOBIUM 1 AMERICANUM, Nutt. Engelm, in Boston Jour. Nat. 

 Hist., 6, p. 214. Slender, fasciculately branched, greenish-yellow ; 

 flowers often verticillate; male flowers almost always terminal on short 

 branchlets, crowded, rarely axillary; berry 1" long. On Pinus contorta, 

 from Colorado northward and westward ; flowers in August and Sep- 

 tember, maturing its fruit in 12-13 months. Delicately fasciculate, 

 much branched plants, V or, 2'-3 > high. Meehan. Mount of the Holy 

 Cross, Coulter. 



ARCEUTHOBIUM ROBUSTUM, Engelm. in Revision Arceuth. ined. Stout> 

 spiked-branched, olive or brownish-green; flowers opposite, spiked; 

 berry 2J" long. On Pinus ponderosa, from Colorado southward and 

 westward ; flowers in June, maturing in 15-16 months. Stouter and 

 darker colored than the last, S'-l' high ; flowers and fruit much larger. 

 Hall & Harbour, 574. Meehan; Woolson. 



EUPHORBIACE.E. 



EUPHORBIA LATA, Engelm. DC. Prod. ,15, 2dpt., p. 18. Canescentwith 

 appressed pubescence; stems from a woody rootstock, spreading, short, 

 rigid, dichotomously very much branched, 3'-&' high ; lower iuteruodes 

 longer than the leaves, uppermost very short; leaves very short-petioled, 



1 AKCEUTHOBIUM, M. Bieb. Dioecious. Male flowers mostly 3-parted. Anthers ad- 

 nate to the middle of the lobes, 1-celled, with one circular opening ; pollen grains spinu- 

 lose. Female flowers mostly 2-parted 7 inferior; ovary ovoid, compressed. Stigma 

 oval or conic. Fruit ovoid, somewhat compressed, opening at base, on an exsert 

 recurved peduncle. Small yellowish or greenish-brown shrubs, parasitic on Coniferce, 

 with 4-angled compressed joints ; opposite leaves reduced to small connate scales ; 

 fructification biennial. 



