Flora of Denver. 39 



short petioled, ovate, serrate. Growing in marshy places along 

 the Platte and Cherry Creek. Spring and summer. 



303. Veronica peregrina L. Stems erect, flowers in the 

 axils of the leaves on short stalks, pods obcordate. Common 

 along the ditches. Summer. 



304. Gerardia tenuifolia VAHL. Stems simple up to the 

 inflorescence, where it branches into several racemes, corolla 

 rose color, pods round, half covered by the toothed calyx. 

 The form here is var. maarophylla Beiith. Found in marshy 

 places along the Platte and Cherry Creek. Fall. 



305. Castilleia Integra GRAY. (PAINTER'S BRUSH.) Stems 

 erect, usually branching from near the base, bracts bright 

 scarlet, covering all the flowers except the long beak of the 

 corolla, which extends nearly an inch beyond. On the Val- 

 verde and Berkeley hills. Spring to fall. 



306. Orthoca'rpus luteus NUTT. Erect, simple, leafy- 

 stemmed, viscid and hispid, corolla yellow with an inflated 

 sac-like lower lip. The leaves and bracts are not colored. 

 Rare, Clear Creek, near Berkeley. Summer. 



OROBANCHACE>*E. (Broom-Rape Family.) 



307. Aphyllon fasciculatum GRAY. Stem white or brown- 

 ish, flowers tinged with purple, on long peduncles. Parasite 

 on sagebrush, the root is round and fleshy. South Denver. 

 Summer. 



308. Aphyllon Ludovicianum GRAY. Spikes densely flow- 

 ered, often compound or several from the same root. Para- 

 sitic on sagebrush or Bigelovia. Less common than the pre- 

 ceding. North Denver, near Argo. Summer. 



VERBENACE^. (Verbena Family.) 



309. Verbena hastata L- Tall, leafless spikes numerous 

 and clustered at top of the stem, corolla blue. Along the 

 Platte. Summer to fall. 



