230 Obeeb 13.— CRUCIPBBiB. 



at apex. — 7(. One of the most popular flowera of the genus, native of England, 

 eto. St. 2f high. Fls. purple. — Several varieties are enumerated, as the double 

 flowered, Brompton Stock, Brompton Queen. Jn.f 



4 M. feneatralis E.Br. Erect, simple ; Ivs. crowded, recurved, undulate, 

 downy ; siliques downy, broadest at base. — % Prom S. Europe. Plant If high. 

 Fls. numerous, large, purple. Jl., Aug.f 



5. DENTARIA, L. Pepper-root. (Lat. dens, a tooth ; from the 

 tooth-like projections of the rhizome.) Sepals converging ; silique 

 lance-linear, with flat, veinless valves, often opening elastically ; placentse 

 not winged ; sds. in a single row, ovate, not bordered ; funiculus broad 

 (0 = ). — Rhizome 1|. Lvs. palmately divided, those of the stem but 2 

 or 3, somewhat whorled. li'ls. white or purplish, in a terminal 

 raceme. 



• Leaves of the stem sub-opposite or sub-Torticillato N03. 1 — S 



• Leaves of the stem alternate Nos. 4, 5 



1 D. diph^Ua L. St. 2-lsaved ; Ifts. suhovaie; rhizome continuous, toothed. — In 

 woods and w5t meadows. Can. to Car., W. to the Miss. St. about If high, 

 round, smooth, with 2, nearly opposite, temate leaves above the middle. Lfts. 

 on very short stafts, the lateral ones oblique, all with rounded, muoronate, un- 

 equal teeth. Pis. racemed, large, white ; the petals much larger than the calyx. 

 The rootstook la long and large in proportion to the plant, besot with teeth, with 

 a pungent, aromatic taste. May. 



2 D. laoiniata Muhl. GauUne lvs. 3, 3-parterf, the divisions lanceolate or linear- 

 ollong, oUuse, loied, toothed or entire ; rhiz. monUiform. — In woods, Can. and U. 

 S. The rootstock consists of several eonuected tubers of a pungent taste. Stem 

 If high, smooth, simple. Lvs. usually in a whorl about half way up, the segm. 

 with very irregular, muoronate teeth, rarely subentire, lateral ones sometimes 

 out nearly to the base, rendering the leaf almost quinate. Root-lvs. generally 

 wanting. Pis. racemed, purplish. Apr., May. 



3 D. multifida Muhl. Cauline lvs. mostly 3, and verticillate, rarely 2, multifid 

 with numerous linear lohes; rhiz. tuberous. — In woods, N". Car, to Ala., rare. St. 

 C — -10' high. Lvs. finely dissected in a bi- or triteruate manner. Fls. white, 

 smaller than in the above species. 



4 D. mdzinia Nutt. Stem about S-leaved (2 to 1) ; Ills. 3, ovate, toothed or clefl ; 

 rhiz. moniliform, the tubers toothed. — IT. Y. and Penn., rare. Tubers of the 

 rootstook thick as the finger, an inch or more in length. St. 1 — 2f high, bear- 

 ing a lengthened raceme, with pale purple flowers which are larger than in No. 1, 

 and several alternate, remote, ternato, petiolate lvs. Lfls, sharply and coarsely 

 cut-toothed or lobed. May. 



5 J3. heterophylla Nutt. St. about 2-leaved{2 or 3), leaflets 3, lanceolate and nearly 

 entire; root-lvs. of 3, ovate-oblong, toothed and cut-lobod lfts. ; rhiz. moniliform, 

 scarcely toothed. — Penn., Va., Ky. A small and delicate species, some 6' high. 

 Tubers of the root few (1 — 3), oblong. Eadical If. always present, long-petioled. 

 The alternate stem-Ivs. small (1' long), also petiolate. Fls. few (6 — 9), pale- 

 purple. Jn. 



6. CARDAMINE, L. Bitter Cress. (Gr. Kapdia, heart, dajmo), 

 to strengthen ; from its stomachic properties.) Calyx a little spreading,- 

 silique linear with flat, veinless valves, narrov)'cr than the dissepiment, 

 and often opening elastically from the base ; stigma entire ; seeds not 

 ■margined, with a slender funiculus (0 = ). Fls. white or purple. 



* Loaves pinnate, witli many leaflets Nos. 1, 2 



* leaves biinple, or partly ternate. Roots mostly perennial, (a) 



a Style slender. In low, wet grounds Nos. 8, 4 



a Stylo none. In high mountains Nos. 5, 6 



1 G. hirstita L. St. (hirsute in Europe) glabrous, erect; lvs. pinnately 5 — II- 

 foUate, terminal Ifl.; largest ; fls. (white) small, silique erect, linear or filiform ; gtig. 



