Rydberg : Studies on the Rocky Mountain Flora 26 



Castilleja trinervis sp. nov. 



A tall perennial with rootstock. Stem more or less villous, 

 especially the upper portion, solitary, simple or branched, 3-6 dm. 

 high : leaves dark green, finely puberulent, entire, acute, usually 

 3-ribbed ; the lower linear, 5-8 cm. long and about .5 cm. wide ; 

 the upper lanceolate and often i 5 mm. wide : lower bracts green, 

 similar but shorter and broader and usually 3-5-lobed : the upper 

 with almost crimson tips : calyx densely white villous, about 3 cm. 

 long, equally cleft in front and behind, each division laterally cleft 

 into two oblong lobes, 5-8 mm. long, tipped with the same color 

 as the bracts : corolla about 4 cm. long, slightly curved, green, but 

 the galea with almost crimson margins : galea about i 5 mm. long : 

 lower lip 4-5 mm. long, dark green, with three narrow lobes : style 

 about 5 mm. longer than the corolla. 



This species is nearest related to C. rhexifolia and C. confitsa, 

 but is characterized by the copious white villous pubescence of 

 the upper part of the stem and the calyx. It grows in open woods 

 at an altitude of 2700-3000 m. 



Colorado: Headwarters of Sangre de Christo Creek, 1900, 

 Rydberg & Vreelaiid, ^620 (type); Gray-Back Mining Camps, 3621. 



Castilleja luteovirens sp. nov. 



A simple perennial with rootstock, often turning black in dry- 

 ing. Stem 3-4 dm. high, leafy, slightly pubescent when young, 

 soon glabrate, except the upper portion which is slightly villous : 

 leaves lanceolate to almost linear, 3-4 cm. long, 3-9 mm. wide, 

 finely puberulent, 3-ribbed, acute, entire, or rarely the upper 3- 

 lobed : lower bracts ovate, obtuse, entire, tipped with light green- 

 ish yellow or greenish white ; the upper ones 3-toothed at the 

 apex and greenish yellow throughout: calyx villous, 15-17 mm. 

 long, almost equally cleft in front and behind, laterally cleft about 

 3 mm.; lobes lanceolate : corolla 22-24 mm. long, greenish ; galea 

 6-"/ mm. long with yellow margins ; lower lip 2.5-3 "^"i- long, 

 bluntly 3-lobed. 



This species has been referred to C. scptcjitrionalis and C. pallida, 

 but differs from both in the broader, less acuminate leaves and 

 broader, more entire yellowish bracts. Neither of the two species 

 mentioned is found in the southern Rockies. Mostly all the 

 material that has been determined as either belongs to the present 

 species. This grows in meadows at an altitude of 1200-2700 m. 



Colorado: Sangre de Christo Creek, 1900, Rydberg & Vree- 



