1 ( J4 OUDER 71. LOBELIACE^E. 



* Pappus bright white. Corolla? bine NOB. 1, 2 



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



1 M. Flortdaiium DC. Smooth; Ivs. rancinately pinnate-parted, segm. few, sin- 



uate-dentate or angular ; pan. loose,- hde. 9''. @ Thickets, N. Y., W. and S. 3 6f. 

 ft. acuniinatuiii. Lvs. lance-ovate, acuminate, toothed, or the lower subruncinate. 



2 M. pulch^llnm 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 If. 



3 OT. leucopltieum DC. Tall, leafy; Ivs. lyrate-runcinate, coarsely-toothed; pr>d. 



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



115. SpNCHUS, L. Sow THISTLE. Invol. many -flowered, imbricate, 

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

 of white-silky hairs, in many series. Cypselse 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, 8 



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



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

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



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



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



3 S. oleraceiiH L. Lvs. sagittate-amplexicanl, runcin.-pinnatifld, snbspinnlous, den 



tate ; ped. downy ; involucre at length smooth ; fruit marvy-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, witu no pales or pappus. N. Hoi. July Oct. 



117. CH APT ALIA, Vent. Invol. campanulate. Scales in few series, 

 dnear, acute. Recep. naked. Ray-fls. $ , ligulate, disk-fls. 5 , but sterile, 

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

 capillary, y Acaulescent. Lvs. all radical. Head cyanic. Mar., Apr. 



C. tomentosa Vent. White-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. LOBELIADS. 



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

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

 split down to the base on one side. Stamew 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 

 the 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, bracted 

 racemes. July Sept. 



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

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



