MACLOSKIE : CRUCIFER^E. 435 



RORIPA PUBESCENS piNNATiSECTA (O. Ktze. sub Nasturtium}. 

 Leaves pinnatisect. 

 (Chili ; Argentina) ; Patagon. 



12. CARDAMINE Linn. Bitter-cress. 



Erect or ascending herbs, with entire or lobed or pinnate leaves, and 

 white or purple racemes. Siliques long, flat, usually erect ; their valves 

 nearly nerveless, elastically dehiscing. Stipe none. Seeds I -seriate in 

 each cell, marginless. Cotyledons accumbent. 



Species 75, in temperate regions. 



KEY TO THE SPECIES. 

 A. Leaves pinnate. 



b. Leaflets orbicular, abruptly attenuate basally. hirsuta. 



b2. Leaflets not basi-attenuate. 



c. Terminal leaflet reniform. glacialis. 



C2. Terminal leaflet obovate. striftula. 



CT,. Pinnae 5, rounded. Sepals ribbed. corymbosa. 



C4. Leaflets all basal, ciliated ; terminal pinnae large. ciliata. 



^5. Lower leaves lyrate, segments reniform. Stigma capitate. tuberosa. 



c6. Terminal leaflet cuneate-oblong, 3-toothed; upper leaves ternate. ramosissima. 



cj. Lower leaves entire, small, with a pinnate pair below ; cauline leaves simple. 



nana. 

 A2. Leaves pinnatisect. 



b. Segments of radical leaves rounded, of cauline angulate. Style filiform. amara. 

 b2. Segments of radical leaves rounded, of upper oblong-sessile. Style thick. Stout herb. 



antiscorbutica. 



b~$. Bipinnatisect ; cauline leaves similar, but smaller. geraniifolia. 



A$. Leaves pinnatifid. 



b. Segments of radical leaves 2-3 pairs. Petals 2-3 times as long as sepals, magellanica. 

 62. Segments linear-lanceolate. Siliques divaricately erect. Styles long. patagonica. 

 3. Segments 3 pairs, fleshy. Style none. Stem none. pygmaa. 



A^. Leaves cordate-rounded, entire toothed. rostrata. 



A$. Leaves all entire, oblanceolate. Floating plant, long stem rooting. callitrichoides. 



i. C. AMARA Linn. 



Leaves pinnatisect; segments of radical leaves subrotund, of cauline 

 dentate-angulate. Style filiform, acutish. Stem rooting at the base. 

 (Eurasia.) Patagon., Punta Arenas. (J. B. Hatcher.) 



2. C. ANTISCORBUTICA Banks & Sol. 



Robust, sometimes villous, from a branching rhizome. Leaves rosu- 

 late, pinnatisect, varying ; radical leaflets 3-4 pairs, rounded, stalked ; 



