

New Plants from Colorado 



By Gf.orcje E. Osteriicht 



^Linum Arkansanum 



Seemingly a perennial, i — 1 . 5 dm. high, minutely scabrous 

 pubescent or almost glabrous, branching from the base, the 

 branches becoming almost as long as the stem ; very leafy, from 

 the base, the upper leaves often as long as the calyx lobes ; stipu- 

 lar glands minute : leaves linear, 1-2 cm. long ; the upper wider at 

 the base and glandular toothed, developing a scarious midvein : 



A W 



flowers numerous, the peduncles about 5 mm. long, scarious wing- 

 angled : the sepals glandular toothed, 3-nerved, the middle nerve 

 scarious-winged, the larger sepals 1 cm. long, all aristate-pointed : 

 the petals large, cuneate, 15 mm. long by 10 mm. wide at widest 

 portion, orange-color, rose-tinted at the base : the styles united to 

 the top, the capsule half the length of sepals, the septa thickened 

 for about one-third of their extent. 



A 



igidum Pursh. Collected 



on gravelly prairie south of the Arkansas River near Rocky Ford, 

 Otero county, Colorado, June 9, 1900, no. 2037. 



- Mentzelia aurea 



4 Perennial, the stem whitish, rather stout, finely pubescent, 

 glandular on the pedicels and ovary ; corymbosely branched from 

 near the base, the leaves linear to oblong, sinuate-dentate to sinu- 

 ate-pinnatifid, the lower including the narrowly winged petiole, 

 10 to 1 5 cm. long, hispid on both sides : flowers numerous, vesper- 

 tine, the earlier ones sessile, the others on pedicels 1-2 cm. long : 

 petals 10, the five outer ones whitish on the outside, 2 cm. long 

 and 8 mm. wide at the widest portion, narrowed to a claw which is 

 nearly half the length of the whole petal ; the five inner ones narrow 

 and not more than half the size of the outer, a number of the outer 

 filaments also petaloid : the capsule a little more than 2 cm. long, 

 striate: the seeds round, winged, mature ones smooth, /. *., not 

 punctate. 



Type specimens collected in Estes Park, Larimer county, Colo- 

 rado, July 18, 1900, no. 2203. A. showy plant, ranging from the 

 edge of the foothills to an altitude of 7000 feet. Before the flowers 

 open they appear to be white on account of the whitish outside 01 

 the petals, but when open they are golden yellow. / %*± P & % 



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