308 SCROPHULARIACE.E. (FIGWORT FAMILY.) 



3. CHELONE, Touru. SNAKE-HEAD. 



Calvx 5-parted or 5-sepalous, br.icted. Corolla inflated-tubular, contracted 

 at the throat, bilabiate; the upper lip concave, emargiiiate ; the lower ob- 

 tuselv 3-lobed, woolly iu the throat, Staintns 4, \\..h the filaments aud cor- 

 date anthers woolly, aud a fifth sterile oue shorter tlum the others. Seeds 

 imbricated, broadly winged. Smooth pereuuial herbs, with opposite serrate 

 leaves, and large white or purple flowers iu short deuse bracted spikes. 



1. C. obliqua, L. Stem mostly simple, 2 = high; leaves large (2'- 5' 

 long), thin, obloiig-ovate, coarsely serrate, tapering iuto a short petiole ; corolla 

 1^' long, bright rose-color. Wet banks, chiefly in the upper districts. Sept. 



2. C. glabra, 1- Stem simple or branched; leaves lanceolate, finely 

 serrate, acute or acuminate, on very short petioles; spike terminal, simpb- <>r 

 branched ; corolla white. Wet banks of streams, rare iu the lower districts. 

 Sept Stem 2 3 high. Leaves J'-4' long, sometimes pubescent beneath. 

 Corolla I' ionic. 



3. C. Lyoni, rursh. Stem simple or branched; leaves ovate or ovate- 

 oblong, rounded or cordate at the base, acuminate, serrate, conspicuously peti- 

 oled, mostly pubescent on the veins beneath; flowers purple. Mountains of 

 North Carolina. Sept. Stem 2 -3 high. Leaves 4' -6' long, thinner, and 

 the flowers smaller thau in the preceding. 



4. PENTSTEMON, L'Hcr. 



Calyx 5-parted. Corolla inflated-tubular, or somewhat bell-shaped, open at 

 the throat, bilabiate; the tipper lip rounded, concave, emarginate or 2-lobed ; 

 the lower 3-lohed. Stamens 4, declined at the base, and a fifth sterile oue as 

 long as the others, and commonly bearded above. Capsule 2-valved, many- 

 seeded. Seeds wingless. Erect perennial herbs, with opposite leaves, and 

 white or purple flowers in axillary and terminal cymes, forming a close or open 

 narrow terminal panicle. 



* Leares pinnatelij rjh-i'ded. 



1 P. dissectUS, Ell. Smooth or minutely pubescent : divisions of the 

 leaves linear, obtuse, entire or sparingly lobed ; cymes few-flowered, loug- 

 peduncled : corolla somewhat hell-shaped, with rounded and nearly equal 

 lobes: anther cells smooth, spreading : sterile stamen bearded at the apex. 

 Dry soil in the middle districts of Georgia. Stem 2 high, slender. Calyx 

 lobes small, acute. Corolla 9"- 10" long, purple. 



* * Lf -tires \mdirided. 



2. P. pubescens, Solander. Puboscent or smooth; leaves lanceolate, 

 acute, serrate or entire, sessile or clasping: the lowest ovate or oblong, taper- 

 ing into a slender petiole ; cymes spreading, few-flowered : tube of the corolla 

 gradually dilated above the middle : lower lip longer than the upper; anthers 

 smooth. Dry open woods and fence-rows. June-.Tulv. Stem 2 high. 

 Lowest leaves 3'-."/ lon<r. Corolla 1' long, pale purple. 



3. P. laevigatus, Soland. Smooth or nearly so; stem leaves ovate- 

 lanceolate, serrate or entire, clasping ; the lowest oblong, narrowed into a 

 petiole ; cymes few-flowered, spreading, forming a narrow panicle ; tube of 



