β.laevigatus. 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, amplexical, entire or remotely serrulate; panicle pubescent, slender; ped. erect; cal. segm. ovate-lanceolate, acuminate; cor. tube long and narrow, scarcely dilated upwards, smooth inside; sterile stam. longitudinally bearded.-River bottoms, near Chicago, Ill. (Mead), also Mo. and Can. W. Plant simple, glaucous, 2f high. Ped. 3 to 7-flowored. Fls. nodding, 9 to 10" long, pale blue. Jn.
5 P. digitalis Nutt. Glabrous; radical lvs. petiolate, oval-elliptic or oblong, cauline lanceolate, amplexicaul, serrate, or rarely entire; panicle loose; ped. erect, spreading; cor. tube abruptly campanulate-dilaled, 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 dilated at base. Fls. numerous. Cor. 12 to 15" long, bluish-purple, varying to white. Jn, Jl
6 P. campanulatus Willd. Glabrous; lvs. acutely serrate, lance-linear or lance-ovate, long-acuminate, often dilated at base; panicle long, loose and secund; cor. tube ventricous above, lobes subequal; sterile fil. bearded.-A very variable species, 2 to 3f high, with largo flowers, varying from light purple to dark red or purple, † 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 lip and sterile til. densely bearded.-Height 2 to 4f. Cor. scarlet, 13" long, † Mexico.
8 P. speciosus Doug. Erect, glabrous, glaucous; radical lvs. petiolate, oblong-spatulate, cauline sessile, lanceolate; panicle elongated, slender, virgate, secund ; cal. segm. ovate-oblong, acuminate, margin membranous; cor. tube enlarged upwards; sterile fil. filiform, glabrous.-Height 3 to -if. Fls. 1 1/2' long, blue. † Oregon.
9 P. gentianoides, with the panicle long, leafy at base; fls. 15 to 18" long, violet, scarlet, etc, 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 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.- With verticillate or opposite lvs., axillary and terminal inflorescence.
1 C. verna Nutt. (Fig. 362.) Minutely puberulent; lowest lvs. ovate or oblong, petiolate, middle and upper sessile, ovate-lanceolate, cordate-amplexicaul, dentate, floral ones lance-linear, entire; verticillasters 2 to 6-flowered; cor. 2 or 3 times shorter than the pedicels, twice longer than the calyx.-Banks of streams, shaded or open, N. Y. near Utica (Gray) to Ill. A tender herb 8 to 18' high, branched from the base. Lvs. 1 to 2' by 1/2 to 1', dilated at base. Pedicels 1 to 1 1/2' long. Cor. 5" long, variegated with blue and white, singular and pretty. May, Jn. 2 C. parviflora Dougl. Lower lvs. ovate, petiolate, upper oblong or lanceolate, few-toothed, the floral lanceolate, entire; verticillasters 2 to 6-flowered ; cor. little shorter than the pedicels, scarcely longer than the calyx.-Shores of Lake Superior to Or. (Pitcher). A smaller plant, with smaller, blue fls.
3 C. bicolor Benth. Lower lvs. ovate, petiolate, upper ovate-lanceolate, sessile crenate, the floral entire, lanceolate; verticillasters 6 to 10-flowered; pedicels shorter than the hairy calyx.-Taller than C. verna, 2f high, with larger, showy fls. Cor. 8 to 10" long, rose-violet, upper lip white, † California.
13. PAULOW'NIA, Siebold. Calyx deeply 5-cleft, fleshy; corolla tube long, declinate, enlarged above, limb oblique, with rounded segments; stamens 4, arched downwards, with no rudiment of a fifth ; capsule ligneous, acuminate, valves septiferous in the middle; seeds ∞, winged. -Tree, native of Japan.
P. imperialis Sieb.-A splendid tree, in parks, with the habit of Catalpa. Branches crooked, nearly horizontal. Lvs. 7 to 12' by 4 to 9', opposite, petiolate, broad-cordate, above entire or somewhat trilobate, villous-canescent both sides, smoothish above when full grown. Panicles very large, terminal, many-flowered. Cor. 1 1/2 to 2' long, between violet and rose-color, striped and spotted within, †
14. MIM'ULUS, L. Monkey Flower. (Gr. an ape; from the resemblance of the ringent or grinning corolla.) Calyx tubular, 5-angled, 5-toothed; corolla ringent, the upper lip reflected at the sides, palate of the lower lip prominent; capsule 2-celled, many-seeded ; stigma thick, bifid.-Herbs prostrate or erect, with square stems and opposite lvs. Ped. axillary, solitary, 1-flowered.
§ Leaves pinnate-veined. Flowers blue (wild) or yellow (cultivated)......
§ Leaves palmate-veined. Flowers yellowor sclarlet........
1 M. ringens L. Lvs. sessile, smooth, lanceolate, acuminate; ped. axillary, longer than the flowers.- . A common inhabitant of ditches and mud soils, Can. and U. S., with large, blue, ringent flowers. Stem erect, square, smooth, about 2f high. Leaves sessile, opposite, serrate, acute, lanceolate. Peduncles about as long as the leaves, square, curved upwards, axillary and opposite. Calyx tubular, 5-angled and 5-toothed. Corolla pale blue, yellow within. Jl., Aug.
2 M. alatus. Lvs. petiolate, smooth, ovate, acuminate; ped. axillary, shorter than the flowers; st. winged at the 4 corners.- In N. Y. to Ind. (Plurumer), and S. States. This, like the last species, inhabits ditches and other wet places, and grows to nearly the same height. The square stem, erect, smooth, and winged at the 4 angles, affords an adequate distinction. Leaves stalked, ovate. Flowers ringent, on short stalks, light purple. Calyx teeth rounded, mueronate. Aug.