32 Flora of Denver. 



251. Asclepias verticillata L. var. pumila GRAY. Low, 

 with crowded filiform leaves; umbels near the top of simple 

 erect stems; flowers small and white. Rather common near 

 City Park. North Denver. Summer. 



352. Asclepias auriculata EXGELM. Leaves very long and 

 linear, alternate and numerous, flowers in close umbels in the 

 axils, not numerous, flowers greenish. This is the Acerates 

 auriculata Engelm of Coulter's Manual. It has recently been 

 united with Asclepias stenophylla Gray, under the oldest name. 

 Rather common, North Denver, near Valverde, and toward 

 Montclair. Summer. 



253. Acerates viridiflora Ell GRAY. Leaves ovate or 

 oblong-lanceolate, umbels few, flowers greenish. Rare, Berke- 

 ley, near Clear Creek, Valverde. Summer. 



GENTIANACE.E. (Gentian Family.) 



254 Eustoma .Russellianum GRISEB. Glaucous, simple- 

 stemmed except above where the inflorescence usually becomes 

 loosely cymose, flowers often solitary; corolla large, funnel- 

 form with a spreading border, divisions blue with a dark spot 

 at base, fringe toothed at the top. This is a biennial, and is 

 rare. I found it near the boulevard in North Denver several 

 years ago. The low, wet place was filled up, and it was buried. 

 This year I found it at Valverde, a single plant. It was also 

 found by Miss Helen Thompson on their ranch out on the 

 Broadway road not far from Denver. 



255. Gentiana calycosa GRISEB. (BLUE-GENTIAN.) This 

 has large tubular blue corollas that do not spread open. The 

 flowers are few, clustered in the upper axils. This was found 

 by Miss E. Eaton along Clear Creek, about six miles from the 

 city. Summer. 



POLEMONIACE^. 



256. Phlox Douglasii HOOK. This is low and spreading, 

 with salver-shaped pink flowers. Rare near Denver, but for- 

 merly common along Park Avenue. Spring. 



