Ordkii 86.— SCROPHULARIACEjE. 521 



1 P. dissectus E1L Minutely pubcrulont; lvs. pinnately parted, segm. linear, 

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

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

 2f high. Leafsegm. distant, rather obtuse, margins revolute. Cor 9 to 10" long, 

 purple, resembling that of Gerardia, but curved. Jn., Jl. — Blackens in drying. 



2 P. graridiilorcis Eraser. Erect, glabrous and glaucous; radical lvs. petiolate, 

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

 panicle long, slender and racemous, interrupted; cor. broadly campan'ulate; ster- 

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

 westward. St. 3f high. Els. I to 3 together iu the upper axils. Cor. 15'' long, 

 variously shaded with blue and purple. 



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

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

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

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

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

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

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



P. ljevigatus. Nearly or quite glabrous; lvs. clasping; sterile fil. shorter. 



4 P. gracilis Nutt. Glabrous; radical lvs. • petiolate, elliptic-oblong or lance- 

 oblong cauline linear lanceolate, amplexieaL entire or remotely serrulate; paniclo 

 pubescent, slender; ped. erect; caL segm. ovate-lanceolate, acuminate; cor. tube 

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

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

 Plant simple, glaucous, 2f bight. PecL 3 to 7-flowered. Fls. nodding, 9 to 10" 

 long pale blue. Jn. 



5 P. vdigitalis Nutt Glabrous; radical lvs. petiolate, oval-elliptic or oblong 

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

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

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

 to Ga and La. St. about 3f high. Lvs. 4 to 6' long, often dflated at base. Fls- 

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



6 P. camparmlsLtus "Willi. Glabrous; lvs. acutely serrate, lance-linear or 

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

 ■cor. tube venlricous above, lobes subequal; sterile fil bearded. — A very variable spe- 

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

 purple, f Mexico. 



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

 lower oblong, upper lance-linear; panicle long and loose; cor. tube long, scarcely 

 dilated upwards ; lower Up and sterile Id. densely beaided. — Height 2 to 4f. Cor. 

 scarlet, 13" long, j- Mexico. 



■8 P. speciosris 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 liL filiform, glabrous. — Height 3 to -If. Fls. 1£' long, 

 blue. \ 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. 



12. COLLIN 'SIA, Nutt; Innocence. (In honor of Z. Collins, Esq., 



of Philadelphia.) Calyx 5-cleft ; corolla bilabiate, orifice closed, upper 



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



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



with 2 membranous, bifid valves; seeds large, concavo-convex. — ® With 



verticillate or opposite lvs., axillary and terminal inflorescence. 



1 C. verna Nutt. (Fig. 362.) Minutely puber-ulent ; lowest lvs. ovate or oblong, 



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



floral ones lance-linear, entire; verticillasters 2 to G-flowercd; cor. 2 or 3 times 



slwrter tiian the pedicels, tu/ics longer than the calyx. — Banks of streams, shaded or 



