203 



including Mt. Baldy. In this I was assisted by Miss Anna 

 Deacon of Iowa, whose keen eyes materially contributed to the 

 success of the search. 



Speaking broadly, the flora of these regions is well known ; yet 

 every visit seems to yield something worthy of note. I record 

 here only a few of the more interesting plants we found. 



1. Silene acaulis L. Extremely abundant, covering the ground 

 with its moss-like growth in many places. Three forms, distinct 

 at a glance, were found. 



(a) Typical, with larger flowers, about lo mm. diameter; stamens long and anthers 

 well developed, exposed; stigmatic branches at first short, later becom- 

 ing elongated; (flowers protandrous). 

 {a}) Flowers pink; the common form. 



(a^) Flowers white, sometimes with a very faint pinkish flush. 

 {b) Small flowers, about 6-6.5 mm. broad; the three stigmatic branches very long, 

 protruding, fully as long as the petals; stamens short, concealed, with minute 

 infertile anthers. 



I supposed, at first, that I had two different species; growing 

 intermixed, but each plant true to a single type. The floras of 

 the region say nothing about dimorphism in the species, but 

 in Knuth's Handbook of Flower Pollination, translated by Ains- 

 worth Davis, Vol. II, the matter is fully explained, with figures 

 after H. Miiller. 



2. Papaver coloradense Fedde. Growing among enormous 

 rocks, quite common in one place. It is not in "The Flora of 

 Boulder, Colorado, and vicinity" (191 1), by Dr. F. P. Daniels, 

 but Mr. D. M. Andrews had previously found it on the south 

 slope of Arapahoe Peak. We found two color varieties in ap- 

 proximately equal numbers; (a) typicum; petals clear bright 

 sulphur yellow; (b) aurantiellum, nov., petals dilute reddish 

 orange (apricot color), white at base, but the base beneath green- 

 ish yellow. Exactly the same color variation is found in the 

 allied European plants. This is certainly the plant named by 

 Fedde, but it may not be truly distinct from P. radicatum. 

 It is not "dense brunneo-setulosa," as Fedde describes; the 

 calyx and upper part of peduncles are so, but the leaves are 

 sparsely pale-hirsute. The peduncles of the orange variety 

 are about 50 mm. long, leaves about 31 mm. of which about 

 13 mm. is blade. 



