Flora of the Palouse Region 8 1 



C. aurea Willd. Glabrous, the branched stems decumbent, 30-50 cm. 

 long: leaves bipinnately compound, pale and glaucous; ultimate segments 

 cuneate-obovate, 3-5-lobed: flowers golden yellow, 2-2,5 cm - l° n g> i n short 

 racemes; spur blunt, shorter than the body: capsule torulose, long-beaked, 

 2-3 cm. long: seeds black, very shiny. Near Wawawai. 



Family 34. CRUCIFERAE. 



Herbs, rarely somewhat woody, with watery sap: leaves alter- 

 nate; stipules none: flowers perfect, regular, in braetless racemes, 

 spikes or corymbs: sepals 4, usually oblong, often clustered: petals 

 4, rarely none, hypogynous, in the form of a cross, equal, gener- 

 ally clawed, alternate with the sepals: stamens 6, rarely fewer, 

 hypogynous, of unequal length, the two shorter opposite the 

 sepals, the four longer opposite the petals: pistil 1 , of two united 

 carpels: pod usually 2-celled, dehiscing by the separation of two 

 valves from the central partition, or rarely indehiscent, either 

 much longer than broad (a silique) or short (a silicle). 



Pod indehiscent, 1 -celled. 



Pod winged. 139. thysanocarpus. 



Pod wingless. 136. aThysanus. 



Pod dehiscent, 2-valved. 



Pod strongly compressed parallel to the partition. 

 Pod short. 



Seeds broadly winged. 132. plaTyspermum. 



Seeds wingless. 



Pod oblong or linear. 

 Pod orbicular. 

 Pod elongated. 



Valves nerveless: leaves all petioled. 

 Valves i-nerved: cauline leaves sessile. 

 Pod more or less compressed at right angles to the partition. 

 Cells of the pod many-seeded. 135. capsella. 



Cells of the pod i-seeded. 127. lEpidium. 



Cells of the pod 2-4-seeded. 128. thlaspi. 



Pod terete or 4-angled, slightly or not at all compressed. 



Pod tipped with a beak. 130. brassica. 



Pod tipped with a short slender style, or style none. 



126. THKI.YPODIUM. 



Stout biennial herbs, often succulent: leaves simple, entire, 

 toothed or pinnatifid, often auricled at the base: flowers usually in 



