PAM. 158. 120 



lanceolate, decurrent; corolla white, staminodium nearly smooth. Pine- 

 land. S " l Summer. 



P. Pentstemon laevigatust. Lower leaves oblong or spatulate, upper If 



ob! -.olate, sessile; corolla purplish; staminodium densely bearded. 



Pine-land. Spring and Summer. 



7. Sterile stamen minute or absent, --------8 



\ 5-toothed. 9 



| Calyx 5-parted. 10 



9. Corolla salverform; — flowers in elongated terminal spikes; calyx- 

 tube 5-10 ribbed; corolla 5-lobed, tube curved. Pine-land. 

 Summer. -------- Buchnera, Blue-hearts 



B. elongata. Stem scabrous, sometimes branched above; corolla blue or white, 

 its tube less than twice as long as the calyx; spikes loosely flowered. 



B. Americana. Stem branched, hispid; corolla purple, its tube more than twice 



as long as the calyx; spikes more copiously flowered. 

 9. Corolla campanulate; — leaves narrow or scale-like; flowers solitary 

 in the axils; corolla 5-lobed, somewhat 2-lipped, rose-purple, 

 rarely white. ---_-____ Gerardia 



a. Perennial with rootstock. Low pine-land. Fall. - G. linifolia 



a. Annuals, with fibrous roots, --__--_-b 



b. Leaves few or scaly. Low pine-land. Fall. G. aphylla 

 b. Leaves succulent, linear. Salt marshes. Summer. - G. maritima 



b. Leaves all more or less linear, _-------c 



c. Larger leaves with clusters of smaller ones in their axils;, - - - d 



c. Larger leaves with few or no such clusters. Low ground. Fall. 



G. purpurea 



d. Leaves opposite. Dry pine-land. Fall. G. setacea 



d. Leaves alternate, at least the upper ones, ----- e 



e. Stem and leaves smooth. Sandy pine-barrens. Fall. - G. filifolia 

 e. Stem and leaves rough. Marshes near the coast. Summer and Fall. 



G. fasciculata 



9. Corolla bilabiate; — flowers mostly solitary in the axils; calyx-tube 



angled; corolla-tube with 2 ridges inside. Cultivated and in 



swamps. Summer and Fall. - Mimulus, Monkey-flower 



M. Jamesii. Flowers yellow. Only cultivated. 

 M. alatus. Flowers blue, violet and white; pedicels stout, 4-winged; leaves 



petioled. 

 M. ringens. Flowers blue, violet and white; pedicels slender, 2-winged above, 



leaves sessile. 



10. Corolla inflated tubular, white, cream-colored, or red; — herbs with 



the flowers in dense terminal spike-like racemes; calyx 5-lobed, 

 bracted; corolla dilated in the throat; staminodium small. 



Chelone, Turtle-heal 



C. glabra. Leaves broadly linear to oblong, acuminate, petioled; corolla white 



or cream-colored, the lower lip bearded. Low ground (near Oitjen). Sum- 

 mer. 

 10. Corolla tubular-funnelform. bright-red; — cultivated shrubs with 



the flowers in loose racemes or single; calyx 5-par. - Russelia 



R. juncea ^equisitiformis). Coral- or Fountain- plant. A shrub with smooth, 

 arching, rush-like branches; leaves from small ovate or spatulate to min- 

 ute-scaly; raceme very loosely flowered. 



