vol, Iv: | Colorado Plants. x 
OXALIS CORNICULATA L. var stricta. ‘The common form 
found at Denver is slender, loosely branching upwards, leaves 
scattered; the alpine variety shows a modification due to 
environment, and becomes low and almost prostrate, leaves 
crowded along the short rather stout stems. . 
PacnystTinA Myrsinires Raf. ‘This is described in 
Coulter’s Manual as having green flowers. All that I have 
seen have purple flowers. 
MENTZELIA ALBICAULIS Dougl. There ate two varieties of 
this common species. One is the widely distributed form with 
slender stems and linear-lanceolate leaves pinnatifid into 
narrow, linear lobes. The other which I name var. INTEGRIFOLIA 
is low with short, stout branches, or in more favorable situations 
becoming a foot high, leaves ovate-lanceolate or even broadly 
ovate entire or rarely coarsely and remotely dentate, petals not 
exceeding the stamens, pubescence somewhat viscid as well as 
barbed. This grows on the adobe desert and blooms almost as 
soon as it is up. It branches from near the base, and the leaves 
seem long and crowded on the short stems; but on the older 
specimens the stems elongate and the leaves are less crowded. 
MENTZELIA MULTIFLORA Gray. At Grand Junction this 
variable species was found growing on a slaty hillside. It 
branched diffusely from the base and above, making a globular 
plant like a tumble weed. The stems are white, slender and 
sinuous; leaves small, about an inch long and pinnately parted 
into narrow, linear divisions; flowers small, not an inch in 
diameter, yellow. Along the McElmo Creek the plants have 
lobed leaves from one to three inches long, stems less numerous, 
stouter and straighter than the preceding, flowers larger. 
MENTZELIA NUDA Torr. & Gray. This varies in the 
manner of growth and size of the flowers. The Denver form is 
loosely branched from near the base upwards, and the flowers 
are large, from one and one-half to two inches in diameter, 
distinctly pedunculate. The form from Southwestern Colorado - 
has an erect stem simple up to the inflorescence; the branches 
are usually short with the almost sessile flowers bunched at the 
ends; flowers about an inch in diameter. 
