(:IUJC1FER/K. 25 



(about half an in.l, u, lonfitl.), sonir. of tl.oni more or less rnnnuont : racemes erect 

 dense y many-llowero.!, 3 to 5 ind.es \nu^ -. corolla white or .■ream-color with blmsh 

 tips; the straight spin- half an inch long, horizontal or ascending, very obtuse 

 oxceechng ho res of tho llower : capsule oval or oblong, turgi.l,^tipped with a 

 slender style : seeds sjiming, crestlcss. — Proc. Am. Acad. x. GD 



Moist and shady rnvinos in the Sierra Nevada, near Trn-kee {Boland^r) : thence to I'lumaa 

 Co.. A. L. Case (for whom .t xh named), Lcnrwn, &c. Also in S. Colomdo, i/,a,u&^ 



OuDEK VII. CRUCIFER^. 



Herbs, with a pungent watery juice, cruciform corolla, tetradynamous stamen<. a 

 2-celled pod (silicic) with 2 parietal placentnp, an<l an embryo hlling the seed with 

 cotyledons (accumbently or incumbently) applied against the ra.licle. — Flowere per- 

 fect, hypogynous. Calyx of 4 sepals, deci.luous. Petals 4, usually with narrowed 

 base or claw, and the lamina spreading, so forming a cross, rarely wanting. Stamens 

 6, two of them inserted lower down on the receptaclo and shorter than tho other 

 four. Ovary 2-colIed by a partition which stretches across from tho placenta?, rarely 

 I-celled by its abortion. Style undivi.lcd or none : stigma entire or 2-lobed 

 I-ruit the peculiar capsule or pod named a si liqiie, or ^^'hen short a si/icle ■ the 2 

 valves falling away from the placentnc. and partition, which persist, forming what U 

 ca led a replnm, ,n a few genera in<lehiscent. Ovules few or numerous, sometime* 

 solitary, campylotropous. Seeds with a smooth coat; albumen none. Cotyledon, 

 cither accumbent (i. c. applied edgewise to the ra.licle) or incumbent (i. e. with the 

 radicle against the back of one of them), usually plane, sometime, (as in Mustard) 

 folded or wrapped around the radicle. Flowers generally in racemes and the pedicels 

 ^vithout any bract. Leaves alternate, without stipules : no glanchilar pubescence 



dist-te/r jl^i^^srZhlr^i^^' CT;"- ;^ irrr -"^ ""1 ''-'^ *'-"--^ '^-- «i---. 



colder rogions. Nearly nil are nnocom exocpUo the evZ"''' ""'' """'' '" '^"' *''"'f^''"'*« ""-^ 



or Mnstanl and tlic root of Horse raS ; s v a „ . .' m^i U;;;"^'"''-; r IT''"^-^."'" ^'"^ ^'"^'' 



n.o staple artiHes of ^od. The order i^so sSllJ'nrtlir-S^l^H; dlsli:!!;- ^^ ^dl^.^t' 



I. Pod regularly dehisrent, 2-valrcd. 



« Pod strongly compressed parallel with the broad partition: cotyledons accuml>ent 



1. -fxacyspermum. Pod lar^e orlnVnlnr s io „ i i i 



winged. Dwarf glabronfn\m,,ar with rflower;r' ^'"'"•'': ""^' "^^'f.^^- Seeds hroadly 



2. AlysBum. Pod small o.Mc lar 9 i ^-'l^ercd 8cape.s: flowers small, whit^. 



Canescent. hrancld^I^ "yZl^lJ- "nt: ' "''" '""'"' "''""'^"- ^"''^ ^^'"^l--- 



• ^;jJlcrir",l:.::iremo;r"^- ^— y-'ed; yalyes flat or convex. Seeds 

 „ -*--•- Pod elongated. 



