lObkliace^. (lobelia family.) 253 



— Margins of fields, &c., Florida, and northward. Sept. @ — Stem 3° - 6° 

 high. Leaves 3' - 6' long, often hairy beneath. Flowers blue. 



2. M. Floridanum, DC. Smooth ; stem panicled above ; leaves all 

 pinnatifid and toothed, with the terminal lobe larger and 3-angled, or the upper- 

 most lanceolate, sessile or clasping ; heads racemose-panicled ; flowers blue. — 

 Rich soil, Florida to North Carolina. Aug. and Sept. — Stem 3° - 6° high. 



* * Pappus tawny. 



3. M. leucoph.Seum, DC. Smoothish ; stem panicled above ; leaves 

 numerous, irregularly pinnatifid, with coarsely-toothed lobes ; the terminal lobe 

 3-angled, or in the upper leaves often linear and entire ; racemes panicled. — 

 Mountains of North Carolina. Sept. @ — Stem 3° - 12° high. Leaves 6'- 

 12' long. Flowers pale blue. 



91. SOWCHUS, L. 



Heads many-flowered. Scales of the involucre imbricated. Keceptacle naked. 

 Achenia compressed, ribbed, not beaked nor narrowed at the apex. Pappus of 

 copious soft white hairs. — Annuals. Leaves entire or pinnatifid. Heads some- 

 what umbelled. Flowers yellow. 



1. S. olera<ceus, L. Smooth ; stem branching ; leaves pinnatifid, with 

 spiny-toothed lobes, clasping ; the lowest petioled ; achenia transversely rough- 

 ened. — Waste places. Introduced. June - Aug. — Stem 1 ° - 29 high. 



2. S. asper, Vill. Smooth, or the upper part of the stem and peduncles 

 hispid ; leaves entire, clasping, fringed with weak spines ; the lowest oblong- 

 obovate, the upper lanceolate ; achenia smooth. — Fields, Florida, and north- 

 ward. June - Aug. — Stem 2° - 3° high. 



Order 73. 'LOBELIACE^. (Lobelia Tamilt.) 



Chiefly herbs, with milky juice. Leaves alternate, without stipules. 

 Flowers irregular. — Calyx 5-lobed, the tube adherent to the 2-eelled 

 ovary. Corolla unequally 6-lobed, valvate in the bud ; the tube split on 

 one side to the base. Stamens 5, inserted on the calyx ; the anthers, and 

 commonly the filaments, united into a tube. Style solitary : stigma 2- 

 lobed, surrounded with a ring of hairs. Fruit baccate and indehiscent, or 

 capsular and 2-3-valved, many-seeded. Seeds anatropous. Embryo 

 straight in fleshy albumen. — Acrid poisonous plants. 



1. LOBELIA, L. Lobelia. 



Corolla bilabiate ; the upper lip small, erect or reflexed, 2-parted, the lower 

 spreading, palmately 3-cleft; the tube straight. Anthers, or a part of them, 

 bearded at the apex, curved. Capsule 2-celled, 2-valved at the apex> many- 

 seeded. — Stems erect. Leaves undivided; the serratures glandular Flowers 

 blue, white, or scarlet, in terminal racemes or spikes. 

 22 



