VIOLACE.E. 23 



Common water-cress, naturalized everywhere, is Nasturtium oSficinale. The 

 yellow-flowered species of that genus are put in Gesner's genus, Roripa, by Greene in 

 his Bay-Reg. Bot., and one species is added, viz: 



R. dictyota. Two to four feet high: pods ovate lanceolate. Marshes of the lower 

 Sacramento. 



R. lyrata may be a variety of N. curvisilequa. 



High authority enables us to shorten the- cumbrous name, Capsella Bursa-Pastoris into 

 Bursa pastor i*, which exactly means shepherd's purse. 



Ch.eirautb.us asper, C. & S., is Erysimum asperum of Bay-Reg. Bot., but there 

 confined to the tall form with usually orange flowers. According to Greene (Pittonia, 

 Vol. Ill, Part 15, p, 131) the low perennial common, along the coast with cream-colored 

 to sulphur-yellow flowers is C. capitatus, Douglas. 



C. angustatus, Greene. Slender perennial 2 feet high, or more; leaves narrow entire 

 or nearly so. Corolla large, yellow, a little one-sided. San Joaquin River, 



C. Calfornicus, Greene. Stout, biennial, strongly angled; leaves runcinately 

 toothed; pods sharply 4-angled. 

 ' C. Occidentalis, Watson. A low annual with winged seeds. Or. and Washington. 



Our species of VE SIC ARIA may now bear the generic name LESQUERELLA. 



Caulanthus Iiemmoni, Wat., Glaucous, 1 or 2 feet high: sepals brownish purple, 

 spreading or reflexed; narrow petals undulate 6 to 8 lines long, white, brown veined 

 pods 2| to 5 inches long: stigmas spreading. 



CAPPARIDACEJE. 



Herbs or shrubs with alternate leaves: differing from Cruciferse in equal stamens, pods 

 on stipes and pedicils commonly bracteate. Plants of this order are mostly in the 

 warm- temperate and tropical regions, while the Cruciferse are mostly found in the cool, 

 temperate and polar regions. Key to genera and species, p. 90. 



CISTACEJE. 



Flowers perfect and regular. Sepals 5, persistent; and two of them smaller, wholly 

 exterior, and bract-like. Petals 5, usually ephemeral. Stamens indefinite, with fili- 

 form filaments; anthers short. Style one. Capsule 3- valved. Seep. 91. 



VIOLACE^E. 



Herbs distinguiohed by the irregular one-spurred corolla of five petals, 5 stamens, 

 adnate introrse anthers conniving over the pistil, which has a club-shaped style with a 



