ORDER 71. LOBELIACE^E. 



* Pappus blight white. Corollas blue NOB. 1, 2 



* Pappus tawny. Corollas cream-colored, turning purplish No. 3 



1 JKK. Floridaimm DC. Smooth; Ivs. runcinately pinnate-parted, segm. few, sin- 



uate-dentate or angular ; pan. loose, hds. 9". @ Thickets, N. ., \V. and S. 3 6f. 

 p. acumtnhlnm. Lvs. lance-ovate, acuminate, toothed, or the lower subruncinate. 



2 JH pulcliellum N. Smooth and glaucous, strict; Ivs. lance-oblong to lin., entire, 



or the lowest runcinate ; pan. corymbed ; fls. bright blue. L. Huron to Oreg. 2 7f. 



3 DI. leucopliaeum DC. Tall, leafy; Ivs. lyrate-runcinate, coarsely-toothed; ped. 



scaly-bracted ; pan. long, compound ; fr. scarcely beaked. @ Moist thickets. 5 lOf. 



115. SONCHUS, L. Sow THISTLE. In vol. many-flowered, imbricate, 

 of numerous unequal scales, at length tumid at base. Recep. naked. Pap. 

 of white-silky hairs, in many series. Cypselae compressed, not rostrate. 

 Leaves mostly spinulous. Heads with many yellow flowers. Europe. 



Flowers bright yellow, in showy heads. Achenia angular. Perennial No. 1 



Flowers pale yellow, in large heads. Achenia flat. Annual. Aug., Sept. .Nos. 2, 3 



1 S. arvensis L. Smooth, erect, hispid above ; leaves runcinate-pinuatifid, spinu- 



lous-dentate, clasping with short auricles at base ; hds. subumbellate. Fields, way- 

 sides, N. Eng., N. Y. 2f. . 



2 S. asper Till. Leaves cordate, amplexicaul, oblong-lanceolate, undulate, spinulous- 



dentate ; ped. snbumbellate ; fruit oval-obovate, 3-ribbed on each side. 1 2f. 



3 S. oleraceus L. Lvs. sagittate-amplexicaul, runcin.-pinnatifid, subspinulous, den 



tate ; ped. downy ; involucre at length smooth ; fruit many-striate. Rubbish. 2 3f. $ 



116. HUMEA ELEGANS. Tall, 4f, branching above into an ample 



capillary panicle ; Ivs. lance-ovate, clasping; heads numerous, small, drooping, with dry, 

 loose scales, and 3 or 4 carmine-red florets, with no pales or pappus. N. Hoi. July Oct. 



117. CHAPTALIA, Vent, Invol. campanulate. Scales in few series, 

 linear, acute. Recep. naked. Ray-fls. ? , ligulate, disk-fls. 5 , but sterile, 

 oilabiate, lips equal, outer 3-, inner 2-parted. Cypselae glabrous. Pappus 

 sapillary. n Acaulescent. Lvs. all radical. Head cyanic. Mar., Apr. 

 C. tomentosa Vent. Whitc-tomentous ; Ivs. oblong-ovate to lance-oval ; hd. nodding 



in bud, erect in fl., on the scape. Moist barrens, S. 612'. Rays 20, rose-colored. 



ORDER LXXI. LOBELIACE^E. LOBELTADS. 



Herbs or shrubs with a milky juice, alternate, exstipulate leaves and scat- 

 tered flowers. Calyx 5-lobed or entire. Corolla monopetalous, irregular, 

 bplit down to the base on one side. Stamens 5, free from the corolla, united 

 into a tube at least by their anthers. Ovary adherent to the calyx tube. 

 Style 1. Stigma surrounded by a fringe. Fruit a capsule 2-3-(rarely 1-) 

 celled. Seeds numerous, albuminous. 



1. LOBELIA, L. Cor. tubular, irregular, cleft nearly to the base on 

 Ihe upper side, upper lip of 2 separate lobes, lower 3-lobed. Anth. united 

 above into a curved tube. Stig. 2-lobed. Caps, opening at the summit. 

 Seeds minute. U Flowers axillary and solitary, or in terminal, bractcd 

 racemes. July Sept. 



^ Corollas scarlet or bright crimson, large...* Exotic, Nos. 15, 16 * Native, No. 1 



5 Corollas blue, or blue and white t Exotic, Nos. 17, 18 t Native. . (a) 



