CMBBLLIFER^. 156 



Gr. TcgyTrrti), to conceal, raivio., a wreath or border; in allusion to the obso- 

 lete border of the calyx. — Smooth, perennial herbs. 



C. CaNADE'nsiS- Dc. Sison Canadense. L. 



Zcfflce^ ternate, smooth ; /cr/;7e?s rhomboid-ovate ; M77)6e/s irregular. In moist 

 woods. Stem smooth, 1 — 2 feet high. Leaves alternate, on long stalks em- 

 bracing the stem at base. Leaflets m 3s, doubly serrate, the lower ones with 

 one or more deep incision, the upper becoming nearly sessile. Umbels axil- 

 lary and terminal, the partial ones with unequal rays, small, white flowers, 

 and minute involucra; universal involucre wanting. Fruit elliptic-oblong, 

 smooth. July. Uoneicort. 



5. BUPLEU'RUM. 



Involucres various; fruit laterally compressed ; carpels 5- 

 ribbed, the lateral ones marginal; seed teretely convex, flat- 

 tish on the face; calyx margin obsolete; petals very short, 

 broadish, entire, inflexed. 



Gr. fiovi, an ox, and TrXivQov, a rib ; the application obscure. — Herbaceous 

 or shrubby. Flowers all pert'ect, yellow. 



B. rotundifo'lium. 



Involucres ; involiiccls of 5 ovate, mucronate bracts ; /cnrfs entire, broadly 

 ovate, perfoliate. In fields and cultivated grounds, N. Y. Stem a foot or 

 more liigh, branching. Leaves smooth, acute above, round and broad at base, 

 one at the base of each branch. Involucels larger than the umbellets, of few 

 (4 — 8) small, yellow flowers. Annual. Tkorovgh-icax. 



6. ZI'ZIA. 



Umbels perfect; involucre 0; involucels few-leaved ; petals 

 acuminate, inflexed, carinate; fruit solid, gibbous; carpels 

 with 5 ribs, the lateral ones marginal; seed plano-convex. 



Gr. (^K^ai/to!/, the name of some obscure plant. — Perennial herbs with yel- 

 low flowers. 



1. Z. AIi'REUM. Dc. Smyrnium aureum. L. 



Leaves biternate ; Zeffl/?e^s oval-lanceolate, serrate ; umbellets with short rays. 

 Hills and meadows. Stems 1 — 2 feet high, branching above, rather slender, 

 erect, hollow, angular-furrowed, smooth as well as every other part of the 

 plant, and furnished with few leaves. The lower leaves are on long petioles, 

 the leaflets with coarse serratures and sometmics quinate. The umbels are 

 about two inches broad, of 10 — 15 rays, the umbellets g inch broad, dense. 

 Flowers numerous, orange-yellow. Fruit oval, brown, with prominent ribs. 

 Root black, tufted, perennial. June. Golden Alexanders. 



2. Z. INTEGE'rrima. Dc. Smyrnium integerrima. L. 



Segments of the leaves oblique, oval, entire, very smooth, glaucous beneath ; 

 loicer Leaves tripinnate, upper ones bipinnate ; uiiiheh \v'\i\\ elongated pedun- 

 cles. Stem 1,2 — Id inches high. Umbels terminal, loose, of long, slender 



