46 FUMARIACEiE. Dicentra. 



externally where exposed to the air, white when subterranean. Leaves commonly 2 from 

 each root, on petioles 4-6 inches long, glaucous underneath, triternately decompound ; the 

 primary and secondary divisions petiolulate ; ultimate segments laciniately pinnatifid, with 

 oblong-hnear lobes, which are tipped with a small bristle. Scape usually from 5- to 7-flowered ; 

 the flowers somewhat secund, nodding, white, tinged with yellow and purple at the summit. 

 Sepals cordate. Inner petals carinate ; the keel not projecting beyond the summit. Spurs 

 diverging almost at right angles to each other, as long as the rest of the petal. Filaments 

 distinct ; the middle one with a subulate process projecting into the cavity of the spur. Stigma 

 compressed, reniform, obtusely 4-lobed. Capsule 15 - 20-seeded; the seeds shining, black. 

 Shady woods, in rich soil, particularly among rocks ; common in most parts of the State. 

 Fl. April. Fr. May. The singular form of the flowers (from which it derives its popular 

 name) has made this plant generally known, even to persons who are unacquainted with 

 botany. 



2. Dicentra Canadensis. Squirrel Corn. Turkey Corn. 



Spurs short, rounded ; wing of the inner petals projecting beyond the summit ; raceme 

 simple, 4 - 6-flowered. — Diclytra Canadensis, DC. prodr. 1. p. 126; Torr. <^ Gr. fl. N. 

 Am. I. p. 67; Bot. mag. t. 3033. D. eximia, Beck, hot. p. 223 ; Darlingt. fl. Cest.p. 399. 

 D. eximia, /3. Hook.fl. Bor.-Am. I. p. 35. Corydalis Canadensis, Gold, in Edin. phil. joum. 

 6. p. 330 ; Thomas in Sill. jour. 26. p. 114. 



Rhizoma creeping, bearing at intervals roundish yellow tubers from a third to half an inch 

 in diameter, each marked with the scar of a fallen petiole. Leaves resembling those of the 

 preceding species, but the ultimate segments longer and narrower; commonly only one to 

 each scape. Scape, when the flowers are fully expanded, overtopping the leaves (5-6 inches 

 high). Flowers very fragrant, cordate-ovate in the outline, about three-fourths of an inch 

 long. Corolla greenish-white, often more or less tinged with rose-color : inner petals strongly 

 keeled. Spurs scarcely one-third the rest of the petal, slightly incurved. Middle filament 

 of each parcel with a callosity, but hardly a spur, at the base. Stigma reniform, more or less 

 distinctly 4-lobed. 



Rocky woods, in rich soil : rather common in the western and northern counties ; but not 

 foiind, hitherto, in the valley of the Hudson below Albany. Fl. April. Fr. May. 



3. Dicentra eximia. ' Choice Dicentra. 



Spurs short, obtuse, somewhat incurved ; wings of the inner petals projecting beyond the 

 summit ; raceme compound, the branches cymulosc ; stigma 2-horned at the apex ; leaves 

 numerous. Diclytra eximia, DC. syst. 2. p. 109 ; Torr. <^ Gr.fl. N. Am. \. p. 665 (suppl.). 

 Fumaria eximia, Ker, bot. reg. t. 50. Corydalis formosa, Pursh,fl. 2. p. 464 (excl. Canad. 

 var.), not Fumaria formosa, Dryand. Diclytra formosa. Ell. sk. 2. p. 177 ; Thomas, in Sill, 

 jour. I. c. ; Torr. 4- Gr. I. c, not of DC, nor Fumaria formosa, Andr. 



