Oedbe 86.— SOROPHTJLARIACE^. fl21 



1 P. dias€ctus Ell. Minutely puberulent; lv3. pinnately parted, segm. linear, 

 entire or few-lobed ; panicle loose, with long, few-flowered peduncles ; cor. some- 

 what bell-shaped, sterile filament bearded at the apex. — In Middle Ga. St. near 

 2i'high. Leaf-segm. distant, rather obtuse, margins revolute. Cor 9 to 10" lonft 

 purple, resembling that of G-erardia, but curved. Jn., Jl. — Blackens in drying. 



2 P. grandifldrua Fraser. Erect, glabrous and glaucous; radical Ivs. petiolate, 

 obovate-oblong, cauline broadly ovate or orbicular, sessUe or clasping, all entire; 

 panide long, slender and racemous, interrupted ; cor. broadly campsnulate ; ster- 

 ile fiL dilated and puberulent at apex. — 111., near Prairie du Chien (Riddell) and 

 westward. St. 3f high. Fls. 1 to 3 together in the upper axils. Cor. 15" long, 

 variously shaded with blue and purple. 



3 P. pubescens Soland. More or less pubescent; radical Ivs. ovate or oblong, 

 petiolate, cauline lanceolate-oblong or lance-ovate, serrulate, sessile; panicle 

 loose ; cor. tube gradually dilated, lower lip plaited and bearded inside, upper lip 

 shorter ; sterile stam. longitudinally bearded. — River banks, bluffs, hills and bar- 

 reos. Can. to Fla. (rare in N. Eng.). A handsome plant, 1 to 2f high. St. round, 

 smooth below, supporting a loose, oppositely branched panicle of bluish-purple 

 fls. Cor. 1' in length; the barren fil. broadest at end. Jn. 



/3. LSViGATUS. Nearly or quite glabrous ; Ivs. clasping ; sterile fil. shorter. 



4r P. grdcilia Nutt. Glabrous; radical Ivs. petiolate, elliptic-oblong or lance- 

 oblong, cauline linear lanceolate, amplexieal, entire or remotely serrulate; panicle 

 pubescent, slender; ped. erect; cal. segm. ovate-lanceolate, acuminate; cor. tubt 

 long and narrow, scarcely dilated upwards, smooth inside ; sterile etam. longitudi- 

 nally bearded. — River bottoms, near Chicago, 111. (Mead), also M;o. and Can. W. 

 Plant simple, glaucous, 2f high. Ped. 3 to i-flowered. Fls. nodding, 9 to 10" 

 long, pale blue. Jn. 



S P. digitalis Nutt. Glabrous ; radical Ivs. petiolate, oval-elliptic or oblong, 

 cauline lanceolate, amplexicaul, serrate, or rarely entire; panicle loose; ped. 

 erect, spreading; cor. tube abruptly campanulate-dilated, beardless, upper lip 

 shorter than the lower ; sterile sta. longitudinally bearded. Rich soils, Ohio, Ind. 

 to 6a. and La. St. about 3f high. Lvs. 4 to 6' long, often dilated at base. Fls. 

 numerous. Cor. 12 to 15" long, bluish-purple, varying to white. Jn., Jl. 



6 P. campanulatua Willd. Glabrous; lvs. acutely serrate, lance-Uriear or 

 lance-ovaie, long-acuminate, often dilated at base; panicle long, loose and secund; 

 COT. tube ventricous above, lobes subequal; sterile fil. bearded. — A very variable spe- 

 cies, 2 to 3f high, with large flowers, varying from light purple to darlc red or 

 purple. \ Mexico. 



7 P. barbdtus Nutt. Scarlet Pent. Glabrous and glaucous; lvs. entire, 

 lower oblong, upper lanoe-Iinear ; panido long and loose ; cor. tvhe long, scarcely 

 dilated upwards ; lower lip and sterile fil. densely bearded. — Height 2 to 4f. Cor. 

 scarlet, 13" long, -j- Mexico. 



8 P. speciosus Doug. Erect, glabrous, glaucous; radical lvs. petiolate, 

 oblong-spatulate, cauline sessile, lanceolate; panicle elongated, slender, virgate, se- 

 cund; cal. segm. ovate-oblong, acuminate, margin membranous; cor. tube en- 

 larged upwards ; sterile fil. filiform, glabrous. — Height 3 to it. Fls. 1^' long, 

 blue, f Oregon. 



9 P. gentianoides, with the panicle long, leafy at base; fls. 15 to 18" long, 

 violet, scarlet, &c., and a few other species are rarely found in gardens. 



i2. COLLIN 'SI A, Nutt. Innocence. (In honor of Z. CoZZiks, Esq., 



of Philadelphia.) Calyx 6-cleft ; corolla bilabiate, orifice closed, upper 



lip bifid, lower trifid, with the middle segment carinately saccate and 



closed over the declinate style and stamens ; capsule ovoid or globous, 



with 2 membranous, bifid valves ; seeds large, concavo-convex. — (J) With 



verticillate or opposite lvs., axillary and terminal inflorescence. 



1 C. v^ma Nutt. (Fig. 362.) Minutely puberulent; lowest lvs. ovate or oblong, 



petiolate, middle and upper sessile, ovate-lanceolate, cordate-amplexicaul, dentate, 



floral ones lanoe-linear, entire ; verticillasters 2 to 6-flowered ; cor. 2 or 5 times 



thorier Hum the pedicels, twice longer than the caiyx. — Banks of streams, shaded or 



