Scrophularinece Chelone. 343 



different popular names in America ; as Turtle-head, Snake - 

 head, Shell-flower, Balmony, etc. 



2. Ch. major, syn. Ch. Lyonsii.- A very handsome robust 

 species, 3 to 4 feet high, with broadly cordate serrulate- 

 ciliate slightly hairy leaves and large purple flowers. 



14. P&NTSTEMOK 



Showy herbaceous perennials with 

 opposite leaves, the upper often sessile 

 and stem-clasping. Flowers in ter- 

 minal thyrsoid panicles. Calyx deeply 

 5-lobed. Corolla tubular, more or less 

 inflated and bilabiate. Fertile stamens 

 4, the fifth sterile one nearly or quite 

 equalling the others. Capsule many- 

 seeded, opening by valves ; seeds wing- 

 less. An exclusively American genus 

 numbering about fifty species, from 

 the north temperate and subtropical 

 regions. The name is a compound of 

 TTfWe, five, and o-r^/xo>^, a stamen, from 

 the barren stamen being conspicuous. 



1. P. acuminatus. A very distinct 

 species about 18 inches high with 

 lanceolate acuminate glabrous glaucous 

 leaves and reddish purple flowers. 

 Corolla slightly bilabiate, with spread- 

 ing lobes. 



2. P. barbatus, syn. Chelone bar- 

 bata. A very beautiful species. Stems 

 slender, 2 to 3 feet high. Leaves 

 narrow, entire, glabrous. Flowers bright 

 scarlet, rose, or white. Corolla-tube 

 narrow, scarcely inflated, limb dis- 

 tinctly bilabiate, lower lip bearded. 

 In a robust variety called P. Torreyi 

 the lip is not bearded, and the stems 

 attain a height of 6 feet. A native of 

 Mexico, flowering in July. 



3. P. diffusus (fig. 189).-This is a Fig . m Pent8lemondlfcsn , 

 spreading plant from 12 to 18 inches (jnat.Bize.) 

 high, with broadly ovate-lanceolate sessile deeply serrate leaves 



