332 ORDER LXI. TJMBELLIFER^. 



with a minute inflexed point. Fruit ovate. Caoyels 3-ribbed. 

 Seeds somewhat terete. Annual, glabrous plants, with dis- 

 sected leaves. 



1. D. capilla'cea, (D. C.) Stem geniculate, slightly angled and fur- 

 rowed, glabrous. Leaves alternate, ternately dissected ; segments capil- 

 lary, spreading. Flowers in compound umbels. Involucre many-leaved, 

 shorter than the rays of the umbel ; involucel many-leaved, linear, un- 

 equal. Petals ovate, acute. Anthers purple. Seeds flat on one side, 

 furrowed on the other. — White. ©. May — June. 1 — 2 feet. 



2. D. costa'ta, (D. C.) St€7n branching toward the summit, slightly 

 angled, glabrous. Leaves very compound ; leaflets parted to the base, 

 somewhat verticillate. Uinbels terminal, large, 10 — 12-leaved, dissect- 

 ed ; involucel many-leaved, as long as the pedicels. Petals acuminate. 

 Seeds glabrous, ribbed. — "White. %. Oct. — Nov. Swamps on the 

 Ogeechee. 4 — 5 feet. 



3. B. Nuttal'lu, (D. C.) Ste^n erect, branching toward the summit. 

 Umbels large ; involucre half the length of the rays. Leaves with 

 somewhat verticillate segments. — White. ^. Florida. 



Genus VII.— LEPTOCAU'LIS. Xutt. 5—2. Sison, Ell. 

 (From the Greek lejitoi, slender, and kaulos, stem.) 



Margin of the calyx obsolete. Fetals oval, entire. Fruit 

 laterally compressed, ovate. Cai^sules slightly ribbed. Seed 

 flat on one side, convex on the other. Herbaceous plants, with 

 glabrous, terete, slender stems. Leaves dissected with linear 

 segments. Umbels opposite the leaves and terminal. Involu- 

 cre none ; involucel few-leaved. 



1. L. divarica'tus, (D. C.) Fruit muricated, with short, somewhat 

 appressed scales. Leaves alternate, divided with linear segments. 

 Uvibel with 5 — 6 unequal rays ; middle one frequently sessile ; involu- 

 cel 3-leaved. Petals oval, flat. — White. ©. March — April. Sandy 

 pastures. 1 — 2 feet. 



Genus VIII.— CICU'TA. L. 5—2. 

 (Origin doubtful.) 



Margin of the calyx 5-toothed, somewhat foliaceous. Fetals 

 obcordate, with an inflexed point. Fruit laterally compressed 

 Carpels ribbed. Seed terete. Involucre few-leaved or none ; 

 involucels many-leaved. Aquatic, perennial, glabrous herbs, 

 with fistulous stems. 



1. C. macula'ta, (L.) Stem striped with green and purple, slightly 

 geniculate. Leaves triternate or quinate ; leaflets ovate-lanoeolate, 

 with acuminate serratures, somewhat scabrous on the luider surface ; 

 petioles of the lower leaves long, sheathing, with membranjiceous wings ; 

 segments of the cal^'x expanding. Petals with long, inflected points. — 

 White, li. July — Aug. Common. 2 — 5 feet. 



Water Hemlock. Spotted Cow-banc. Beaver Poison. Musquash. 



