292 LXVII. UMBELLIFERJi:. Chjerophyli.um. 



flat. — Stout herbs, with large umbels. Invol. deciduous. Involuccls 

 many-leaved. 



H. LANATUM. 



Jjvs. ternate, petiolate, tomentose beneath; Ifis. petioled, round-cordate, 

 lobed ; fr. orbicular. — Penn. to Lab. W. to Oreg. A large, coarse-looking, um- 

 belliferous plant, growing about moist, cultivated grounds. Stem about 4t' high, 

 thick, furrowed, branching, and covered with spreading hairs. Leaves very 

 large, on channeled stalks. Leaflets woolly underneath, irregularly cut-lobed 

 and serrated. At the top of the stem and branches are its huge umbels, often a 

 foot broad, with spreading rays, and long-pointed, lanceolate involucels. In- 

 volucre of lanceolate, deciduous leaflets. Petals deeply heart-shaped, white. Jn. 



24. POLYT^NIA. DC. 

 Calyx limb S-toothed ; petals with a long inflesed point ; fruit oval, 

 glabrous, lenticularly compressed on the back, with a thickened, 

 corky margin ; ribs obscure or obsolete ; commissure with 4 — 6 vittae ; 

 seeds plano-convex. — A smooth herb., with bipinnately divided leaves. 

 Invol. 0. Involucel of setaceous bracts. 



P. NUTTALLII. DC. 



Prairies and barrens, Western States ! &c. Stem furrowed, scabrous or 

 nearly smooth. Lower leaves on long petioles, segments incisely toothed, upper 

 ones 3-cleft, lobes entire or with lateral teeth. Umbels terminal and opposite 

 the leaves, about 2' broad. Fruit large, (3" long) tumid and smooth, with a 

 thick, corky pericarp, and the flavor of turpentine. May. 



25. D AUG US. Tourn. 



AatJKOj, the ancient Greek name of the carrot. 



Calyx limb 5-toothed, petals emarginate with an inflected point ; 

 the 2 outer often largest and deeply 2-cleft ; fruit oblong ; carpels 

 with 5 primary, bristly ribs, and 4 secondary, the latter more promi- 

 nent, winged, and divided each into a single row of prickles, and hav- 

 ing single vittpe beneath ; carpophore entire, free. — d) Invol. pinnati- 

 fid. Involucels of entire or o-clcft bracts. Central Jl. abortive. 

 D. Carota. Carrot. 



St. hispid; petioles veined beneath; Ivs. tripinnate or pinnatifid, the seg- 

 ments linear, acute ;«?»6eZ5 dense, concave. — The word fear in Celtic signifies 

 red, hence carrot. JNaturalized in fields and by roadsides, abundant in the Mid. 

 States. Root fusiform. Stem 2 — 3f high, branching. Leaves numerous, 

 divided in a thrice pinnatifid manner, pale green. Umbels large and very com- 

 pact, with white flowers blooming all the summer. Cultivation has produced 

 several varieties. Jl. — Sept. ^ j^ 



Suborder 2.— C AMPYL.OSPERMJG. 

 The inner surface of the seed deeply furrowed, or with involute margins. 

 26. CH^ROPHYLLUM. 

 Calyx limb obsolete ; petals obovate, emarginate, point inflexed ; 

 fruit laterally compressed ; carpels with 5 obtuse, equal ribs ; inter- 

 vals with 2 vittoe, commissure deeply sulcate.— iws. bi- or triternate, 

 segments incisely cleft or toothed. Invol. 0, or few-leaved. Involucel 

 many-leaved. 



C. PROCUMBENS. Lam. (Scandix procumbens. Linn.) 



Decumbent or assurgent, nearly glabrous; segments of the Ivs. pinnatifid, 



with oblong, obtuse lobes; umbels difl^use, few-flowered, often simple; invol. 0; 



fr. linear-oblong. — (T) or (g) Moist woods, Ohio, Clark! Ky. Slwrt, to N.J. 



Stems 1 — 2f long, pubescent when young, diffuse, slender. Segments of the 



