286 DICOTYLEDONS. CRUCIFER/E. Lepldilim. 



the petals ; 2 solitary, 4 in 2 pairs. Ovary and Style\. Disk m 

 the form of hypogynous glands. Pericarp (a Siliade or SiUqiia) 

 2-celled, 2-valved, many- seeded. Placenta like a dissepiment, 

 parallel with the valves. Seeds without albumen, in two rows 

 in each cell. Embryo recurved. Radicle opposite the hilum. 



Herbs. Leaves alternate. Flowers in corymbs, spikes, or panicles. 

 31irb. 



DiV. I. SiLICULOS.E. 



1. CAKILE. 



Pouch of 2 single-seeded articulations ; upper articulation with 

 an erect sessile seed ; the lower one with a pendulous seed 

 (sometimes abortive) . 



1. C. maritima, articulations of the pouch two-edged the upper 

 one sagittate, leaves pinnatifid subdentate fleshy, p. 193. 



2. CRAMBE. 

 Pouch with the upper articulation subglobose ; its seed inverted, 

 fixed to the base of the cell by its (long, curved) seedstalk ; the 

 lower articulation abortive, resembling a pedicel. 



1. Cr. maritima, the four longer filaments forked, pouch point- 

 less, leaves roundish sinuated waved toothed glaucous and as 

 well as the stem glabrous, p. 193. 



3. CORONOPUS. 



Po7/f/j 2-lobed, without valves, wingless ; ceils 1 -seeded. Coty- 

 ledons incumbent, linear. 



I. C. Ruellii, pouch undivided crested with little sharp points. 

 p. 193. 



4. THLASPI. 



Pouch compressed, emarginate ; the valves keel-shaped (often 

 winged) many-seeded. Filaments without teeth distinct. Cal. 

 unequal in its insertion, patent. 



1. Th. arve?ise, pouch orbicular, its wings dilated longitudinal, 

 seeds concentrically striated, leaves oblong sagittate tootlicd 

 glabrous, p. 194. 



2. Th. Bursa-Pastoris, pouch obcordate without wings, radical 

 leaves pinnatifid. p. 194. 



5. TEESDALIA. 



Pouch emarginate, the valves keel-shaped ; cells 2-seeded. Fila- 

 ments with a little scale on their inside. 



1. T. nudicaulis. p. 194. 



6. LEPIDIUM. 



Pouch with 1 -seeded cells, their valves keel-shaped. Pel. equal. 



