260 RYDBERG: STUDIES ON THE 
long and fully as wide, very thin, at first white but turning pink in 
age: filaments about 2.5 cm. long: anthers versatile, 1.5 cm, long 
and 2 mm. wide: style exserted ; lobes of the stigma about 5 mm. 
long : capsule with rather strong sinuately lobed ridges. 
This species differs from P. caespitosum (Nutt.) Raimann in the 
villous ciliate leaves, the longer hypanthium which is much broader 
at the throat than in any of the other species, the longer sepals 
which much exceed the petals in length, and the less tubercled 
ridges of the pod. It grows in cafions at an altitude of 1500— 
2800 m. 
Cotorapo: Tributaries of Turkey Creek, 1900, Rydberg & 
Vreeland, 5857 (type). 
Pachylophus exiguus (A. Gray) Rydb. nom. nov. 
Ocnothera exigua A. Gray, Pl. Fendl. 1849. 
This species was merged into P. caespfitosus by Dr. Watson ; 
but it is perfectly distinct. The plant is nearly always taulescent 
with a stem 0.5—2 dm. high, the leaves and hypanthium are villous 
as in the preceding species, but still more so, the hypanthium is 
fully as long, but less widened at the throat, and the angles of the 
pod with more prominent sinuately lobed crests than in P. caesfi- 
tosus. This species is represented in the New York herbaria by 
the following specimens : 
Cotorapo: Rocky Ford, 1891, C. S. Crandall ; Mesas near 
Pueblo, 1900, Rydberg & Vreeland, 5858 ; Rocky Ford, 1900, 
G. Osterhout, 2085. 
New Mexico: White Mountains, 1897, Z. O. Wooton, 659. 
Arizona: Walnut Cajion, 1898, MacDougal, 341. 
~ Androsace puberulenta sp. nov. 
A puberulent rosulate annual: leaves oblanceolate, 1-3 cm. 
long, acute, entire or sinuately denticulate, densely puberulent : pe- 
duncles several, 3-10 cm. long: bracts narrowly lanceolate, 3-4 
mm. long: pedicels 1-5 cm. long, spreading, densely puberulent : 
calyx 3-4 mm. long, cleft to the middle; tube glabrous, turbi- 
nate ; lobes lanceolate, strongly keeled, densely puberulent, in fruit 
much exceeding the short capsule : corolla white, about equalling 
the calyx. 
This species is in habit intermediate between A. subumbellata 
and A. diffusa, but differs from both in the densely puberulent 
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