RYDBERG: STUDIES ON THE RocKy MOUNTAIN FLORA 477 
in the subspecies delicatum, the stem is pubescent with long white 
spreading hairs and the leaflets are decidedly acute, while in the 
forms included in the subspecies parvifolium, the stem is merely 
puberulent and the leaflets usually obtuse. 
The specimens cited under the subspecies delicatum belong to 
three or four different species. Those from Colorado and Utah 
belong to P. scopulinum Greene and P. delicatum Rydb., which 
perhaps may not be specifically distinct. Those from California 
belong to P. californicum Eastw. Those from Washington and 
perhaps those from Oregon to an undescribed species, characterized 
below. | 
The subspecies parvifolium was divided in var. a Haydenii and 
var. B pilosum (= P. pilosum Greenman). It is very hard to 
interpret Dr. Brand’s arrangement. He gives under the sub- 
species parvifolium the following synonyms: P. parvifolium Nutt.; 
P. coeruleum J. Hook.; P. mexicanum Nutt.; P. viscosum A. Gray, 
not Nutt., but cited no specimens. His usage as well as that of 
‘most European botanists is to designate the typical form by var. 
a. Hence var. a Haydenii is the typical form of subsp. parvifolium, 
and still under this he has the following synonyms: P. Haydeni 
A. Nels., P. montrosense A. Nels., and P. Tevisit Eastw. P. parvi- 
folium Nutt. is the same as P. mexicanum Nutt. and P. viscosum 
A. Gray, and is characterized by its small dense inflorescence and 
its obtuse calyx-lobes, or the latter even rounded at the apex; 
but it is not the same as P. coeruleum y Hook., or P. Haydeni A. 
- Nels., or P. Tevisit Eastw. 
Polemonium coeruleum y Hook. is the original P. pulcherrimum 
Hook., and this should have been made subsp. A var a, according 
to Brand’s system. P. Haydeni resembles it closely in flowers, 
leaves and pubescence, but differs considerably in general habit 
and the inflorescence. : 
Polemonium columbianum Rydb. sp. nov. 
Perennial,{with a branched rootstock and caudex; stems several, 
2-3 dm. high, viscid-pubescent with flattened hairs, and distinctly 
glandular in the inflorescence; leaves 5-15 cm. long, likewise 
sparingly viscid-pubescent, pinnate; leaflets 9—19, elliptic or 
lance-elliptic, acute, 1.5-3 cm. long; inflorescence corymbiform- 
paniculate; calyx about 6 mm. long, glandular-puberulent and 
