18 SYNOPSIS OF THE FLORA OF COLORADO. 



RUTACEJE. 



PTELEA ANGUSTIFOLIA, Benth. Distinguished from P. trifoliata, L., 

 (Gray's Manual, p. 110,) by its much smaller and more emarginate 

 fruit, and its oblong or lanceolate leaves, pubescent or villous, becomr 

 ing smooth and shining with age. Fifteen miles west of Canon City, 

 Porter; Eedfield. 



VITACE^E. 



VITIS RIP ARIA, MX. ( V. cordifolia, MX., var. riparia., Gr.) Canon City. 

 Brandegee. 

 AMPELOPSIS QTJINQUEFOLIA, MX. Median. 



PACHYSTIMA 1 MYRSINITES, Eaf. (OreopUla myrtifolla, Nutt.) Stems 

 10-2 high, densely branched, very leafy; leaves roundish-oval, or 

 oblong, J"-9" long; flowers somewhat fascicled on short peduncles, 

 small, green or brownish, apparently always perfect (monoecious, Nut- 

 tall.) In dense clumps on wooded slopes. Hall & Harbour, 92; Parry. 

 At middle elevations, rare. 



RHAMNACEJE. 



CEANOTHUS VELUTINUS, Dougl., var. LJEVIGATUS, T. & G. A dense- 

 ly-branched shrub, usually 2-4 high ; leaves round or ovate-elliptical, 

 2' 3' long, rather obtuse, sub-cordate, glandularly crenate-serrate, 

 coriaceous, glabrous and shining above, smooth or very slightly pubes- 

 cent and strongly 3-ribbed beneath; petioles J' in length; panicles 

 axillary, compound, on rather long peduncles; flowers white. Parry. 

 Mountains west of Denver, Greene. 



CEANOTHUS FENDLERI, Gr. Shrub, 1 J high, widely and intricately 

 branched; branches and branchlets terete, slender, often spinescent, 

 whitish, puberulent, at length glabrous, smooth; leaves small, J'-J' 

 long, oval or elliptic, obtuse, very entire, not glandular, 3-nerved, silky- 

 canesceiit beneath, smoothish and green above; flowers in clusters, 

 dense, sessile, glabrous, white. Hall & Harbour, 90. Wet Mount- 

 ain Valley, Brandegee. In the mountains, on the road from Denver to 

 Idaho Springs, Porter. Sangre de Cristo Kauge, Redfield. 



CEANOTHUS OVALIS, Big. Foot-hills along the Platte, June, Coulter. 



CEANOTHUS OVATUS, Desf., DC. Prod., 2, p. 31. (C. Americanus, L., 

 var. herbaceus, T. & G. Fl. N. Am. 1, p. 264.) Leaves ovate or oval, ser- 

 rate, 3-nerved, glabrous; thyrsus shortened; fruit sub-globose, 6-ribbed. 

 Hall & Harbour, 91. This plant we have not seen. 



SAPINDACE.E. 



ACER GLABRUM, Torr. (A. tripartitum, Kutt.) Shrub, G-10 high; 

 leaves sub-reuiform, orbicular in outline, 3-lobed or more iisusally 3- 

 parted; segments short and broad, acutely incised and toothed, some- 

 what 3-lobed, middle one cuneate ; corymb nnibeled, pedunculate, few- 



1 PACHYSTIMA, Raf . Petals and stamens 4, inserted on or below the margin of the 

 broad, flat, quadrangular disk that covers the small pyramidal ovary, and adheres to 

 the throat of the short, obcoiiic, 4-lobed calyx. Style very short ; stigma obsoletely 

 2-lobed. Capsule coriaceous, oblong, acute, 2-celled, loculi'cidally 2-valved; cells 1-2 

 seeded. Seeds inclosed in a white, membranous, dissected axil. A low, branched, 

 leafy, glabrous shrub, with opposite, short-petioled, mostly serrate, evergreen leaves 

 and axillary flowers. Bentli. $ Hook. 



