CAPPARIPACEJE. 



229 



Fruit notched at summit and at base, strongly didymous, wrinkled 



1. C. flidymus. 



Fruit not notched above, obscurely didymous, strongly roughened and 

 cristate-muricate 2. C. Ruellii . 



1. C. didymus (L) Smith. Wart-cress. Herbage heavy-seen ted, 

 sparsely hairy or almost glabrous; stems numerous, freely branching, 

 diffuse or prostrate, 1 to 2 ft. long; leaves 1 in. long or less, pinnately 

 parted into entire or sharply toothed segments; flowers minute, 

 greenish white; pods small, about 1 line broad, notched both above 

 and below, thus appearing transversely 2-lobed or didymous, each 

 lobe turgid and finely wrinkled. — (Scnebiera didyma Pers.) 



Naturalized weed near dwellings: Montezuma Hills, Solano Co. 



2. C. Ruellii All. Swine-cress. Stems stouter; leaves pinnately 

 parted (the segments mostly £ in. long and deeply 2 or 3-toothed), 

 long-petioled, 2 to 2£ in. long; "pods flattened, H to If lines broad, not 

 notched at summit nor scarcely 2-lobed but strongly roughened, both 

 muricate and cristate. — (Senebiera Coronopus Poir.) 



Naturalized weed: San Francisco. 



39. CAPPARIDACE/E. Caper Family. 



Ours annuals with palmately compound alternate leaves and 

 fugacious or deciduous stipules. Flowers complete, in bracted 

 racemes. Sepals 4, sometimes united at base. Petals 4. Stamens 

 in ours 6 (in other genera often many), more or less unequal, com- 

 monly inserted on the very base of the calyx, or hypogynous. Ovary 

 raised on a stipe, 1 or 2-celled, composed of 2 carpels. Valves in 

 fruit separating from the placenta? and releasing the many seeds, or 

 the valves 1-seeded and separating from the axis as nutlets. 



Stipules fimbriate, 1 to 2 lines long; capsule 1-celled, the valves falling away 

 from the placentae 1. Cleomella. 



Stipules consisting of minute bristles; capsule 2-celled, 2-seeded, each valve 

 closely investing its seed and falling away with it . . . .2. Wislizenia. 



1. CLEOMELLA DC. 



Branching annuals. Leaves with 3 leaflets and in ours with tufts 

 of bristles for stipules. Flowers yellow. Stamens 6, exserted. 

 Pods rhomboidal, few-seeded and small, pendent on spreading 

 pedicels, ours with the valves produced laterally into acute or 

 slender horns. (Diminutive of Cleome, ancient name of some 

 European plant.) 



1. C. obtusifolia Torr. Branching from the base, 3 in. to 1£ ft. 

 high, finely pubescent or hairy; leaflets broadly obovate to oblong, 

 shorter than the petioles; stipules deciduous; petals 2 lines long; 

 sepals ciliate or almost fimbriate, very much shorter than the petals; 

 pods 2 to 4 lines broad; stipe 3 lines long, reflexed upon the pedicel. 



Sacramento, Fremont; said to have been re-collected in the same 

 locality in recent years. 



2. WISLIZENIA Engelm. 

 Erect branching rank-scented annuals. Leaves with 3 leaflets and 



