3-i ORDER ll.-CRUCIFEILE. 



2 C. a urea Willd. Low, diffuse, finally ascending ; leaf-lobes acute ; rac. opposite the 



Ivs. and terminal ; fls. secund, bright yellow, spur deflected ; pods pendulous, toru- 

 IOUP; seeds turgid, polished. (T) Rocky shades. 812'. Cor. 6". Bracts lance- 

 ovate. Apr. July. 



/3. macrantha. Fls. 10", spur nearly as long as limb ; bracts and leaf-lobes linear. 

 Dakota ; sent by Dr. W. Matthew?. 



y. ndvula. Fls. 3 1", pale yellow, spur very short, petals pointed. Common. 



3 O. in outa tia Engelm. "i Ascending ; rac. terminal ; leaf-lobes obtuse, bracts lance- 



olate ; cor. yellow, spur ascending, nearly as long as limb, lower petal at length i"*u- 

 dent ; pods erect ; seeds lenticular. La. Tex. I 



4. FUMARIA, L. FUMITORY. (Lat. fumus, smoke ; from its disa- 

 greeable odor.) Sep. 2, caducous. Pet. 4, unequal, 1 of them spurred at 

 the base. Nut ovoid or globous, 1-seeded, and indehiscent. Lvs. cau- 

 line, finely dissected. 

 F. ollicina.il* L. Diffusely branched, erect ; Ivs. bipinnate ; rac. loose ; fle. minute, 



purple at the tip ; calyx serrated ; ped. erect, twice longer than bract ; nut round- 



retuse. Waste grounds, . If. July, Aug. 



ORDER XI. CRUCIFEILE. CRUCIFERS. 



Herbs with a pungent, wateiy juice, and alternate, exstipulate leaves, 

 with flowers cruciform, tetradynamous, generally in racemes, and bractless. 

 Sepals 4, deciduous. Petals 4, hypogynous, with long claws and spreading 

 limbs. Stamens 6, the 2 outer opposite ones shorter than the 4 interior. 

 Ovary 2-carpelled, 2-celled by a false partition, with parietal placentae. 

 Fruit a silique, or silicle, usually 2-celled. Stigmas 2, sessile. Seeds 2-rowed 

 in each cell, but often so intercalated as to form but 1 row. Embryo with 

 the 2 cotyledons variously folded on the radicle. Albumen 0. Illust, 55, 

 104, 192, 193, 239, 336, 429, 506. 



1 2 3 A large and important Order, difficult ot 



analysis. The Genera cannot be well 

 distinguished by their flowers, so nearly 

 alike are they in all. Their characters 

 are taken from the fruit and seeds. Hence 

 it is indispensable that specimens for analysis should be in fruit as well as 

 in flower. DeCandolle arranged the Genera into Tribes according to the 

 folding of the cotyledons upon the radicle. This occurs in three different 

 modes, as follows : 



Cotyledons incumbent, when they are so Dent or folded as to apply the 

 back of one of them to the radicle, as in tne seed of Capsella, fig. 1. 



Cotyledons accumbent when they are so turned as to apply their edges 

 to the radicle, as seen in ;he seed of Arabis Canadensis, fig. 2. 



Cotyledons conduplicate, when thev are not only incumbent, as in the 

 first case, but also folded on and partly embracing the radicle, as in Mus- 

 tard, fig. a 



