66 FUMARIACE^. Dielvtra. 



at the base. Carpels apprcssed, (at first united, at length separating. Hook.) 

 6-8 lines long: stigmas persistent, 2-3 lines long. Torus somewhat dilated. — 

 P. leiocarpum, Fisch. &■ Meyer, is nothing more than an accidental variety ; 

 the carpels in some of Mr. Nuttall's specimens being perfectly glabrous, iii 

 others with a few hairs. — This anomalous genus is almost exactly interme- 

 diate between Papaveracese and Kanunculacese. 



Order XIII. FUMARIACE^. DC. 



Sepals 2, small, deciduous. Petals 4, hypogynous, cruciate ; one or 

 both of the two outer ones saccate or spurred at the base ; the inner 

 pair cohering at the callous apex, and enclosing the anthers and stig- 

 ma. Stamens 6, hypogynous : filaments in two parcels, placed oppo- 

 site the outer petals, dilated, distinct or usually diadelphous: anthers 

 adnate, extrorse ; the middle one of each parcel 2-celIed ; the lateral 

 ones 1-celled. Ovary composed of 2 united carpels, l-celled, with 2 

 parietal placentae : style filiform : stigmas united, often lobed or cuspi- 

 date, alternate with .the inner petals. Fruit either an indehiscent 1— 

 2-seeded nut, or a 2.valved many-seeded pod-shaped capsule ; the 

 valves at length often separating from the persistent filiform placentae . 

 Seeds anatropous or partly campulitropous, shining, arilled : albumen 

 fleshy. Embryo in the genera with indehiscent fruit minute and ex- 

 centric, in the others longer and more or less curved or circinate. — 

 Annual or perennial glabrous and often glaucous herbs, with a watery 

 juice. Leaves alternate, ternately or pinnately divided, exstipulate. 

 Flowers racemose or cymose, purple, white, or yellow. 



The two lateral stamens of each pai'cel, having unilocular anthers, may be con- 

 eidered as half-stamens, formed by the division of the two stamens which correspond 

 to the inner petals : the true number in the order, according to this view, being four, 

 one to each petal. — Lindley is inclined to regard the sepals as bracts, and the outer 

 petals as sepals : but their analogy with Papaveracese (from which Lindley, follow- 

 ing Bernhardi, distinguishes them only as a suborder) does not favor this view. 



1. DIELYTRA. Borkhamen; Hook. (Diclytra, DC.) 



Exterior petals equally saccate or spurred at the base. Capsule pod-shap- 

 ed, many-seeded. — Perennial herbs. Flowers (mostly) on scapes: racemes 

 simple, the pedicels furnished with a pair of opposite bracteoles ; or com- 

 pound, with the divisions cymose. 



The centrifugal developement of the branches of the inflorescence in D. formosa, 

 &c. is indicated by the bibracteolate pedicels of D. CucuUaria and Canadensis. 



1. D. Cucullaria (DC.) : spurs divaricate, straight and rather acute ; 

 wing of the inner petals short; raceme simple, 4-10-flowered. — DC. syst. 2. 

 p. 118; Hook.jl. Bor.-Am.. l.p. 35. D. Canadensis, Borkh. fide DC. Fu- 

 raaria Cucullaria, Linw. ; Michx.! Ji. 2. p. 51; Bot. mag. t. 1127. Cory- 



