^^ CRllCIFEll^E. Tropidocarpum. 



20. TROPIDOCARPUM, Hook. 

 Pod linear, llutlened laterally, ol'tou 1 -celled by the disappearance of the narrow 

 partition : valves carinate, 1-nerved. Seeds in two rijws, minute, flattened, not 

 winged: cotyledons incumbent. Stylo short. — A low slender hirsute branching 

 annual, with pinnately divided loaves, ami yellow solitary axillary flowers. 



1. T. gracile, Hook. Stems M-eak, 2 leet high or less: leaves pinnatifid or 

 rarely l!-i)iiiiuitihd, witli narrow or linear segments : flowers in the axils of the upper 

 bract-like leaves; petals H to 3 lines lung, nearly twice longer tlian the obtuse 

 sepals : pods G to 30 lines long, more than a line broad, pointed at both ends, 

 ascending on slender spreading pedicels lU to 20 lines long. — Ic. PI. t. 43. 1\ sca- 

 b7iusculum, Hook. 1. c. t. 52. 



Valleys and low hills in the C'oust liuagos rioia Los Aiigoles to the Sacraiiieuto. 



21. CAPSELLA, llcench. 

 Pod obcordate or oblong, much flattened laterally, many-seeded : valves carinate, 

 l-nerved. Seeds not winged : cotyledons incumbent. Style none or very short. — 

 Slender and mostly smooth annuals; with small white flowers, and simple or pin- 

 nate leaves. 



Only half a ilozcn species nro known, somewhat divorso in habit and characters, natives of the 

 northern hemisphere, — two North American, of which one enters California. 



1. C. divaricata, Walp. Glabrous, very slender and diffusely branched, 3 to 

 12 inches high : j'adical leaves an inch long or less, pinnate or pinnatifid with few 

 lobes, the ujjper oblanceolate to linear, entire : pods elliptic-oblong, 2 lines long, on 

 very slender spreading peilicels. — Watson, Bot. King Exp. 28. Ilymenololus diva- 

 ricahis & eredus, Nutt. in Torr. & Gray, Fl. i. 117. 



In saline or alkaline soils ; Vallejo {Greene) ; S. California {Coulter) ; and eastward of the 

 Siena Nevada from the Coliiniliia Kiver to Colorado and S. Utah. 



2. C. Bursa-pastOl'is, INhench. Usually somewhat hirsute at base, 12 to 18 

 inches high, branching : radical leaves mostly runcinate-pinnatitid, the cauline lan- 

 ceolate auricled at biit;e, toothed or entire : pods cuneate-triangular, truncate above, 

 1 to 2 lines long and broad : pedicels widely spreading : seeds numerous, minute. 



Originally from I'.iuope, now naturalized as a harmless weeil over most of the civilized world ; 

 known ub iy/ujiherU's J'nrsr. 



22. LYROCARPA, Hook, c^ llaiv. 



Pod fiddle-shaped or reniform-obcordate, strongly flattened laterally, somewhat 

 acutely carinate : cells 2 - 5-seeded. Seeds rounded, flattened, narrowly winged : 

 cotyledons accumbent. Style very short: stigma 2-lobed. — Pubescent annuals; 

 leaves lymtely jjinnatifid, petioled ; flowers purplish, with long narrow calyx. 



1. L. Coulteri, llook. & Ilarv. Canescently pubescent throughout with branched 

 hairs ; stem about a foot high, loosely branched : leaves all petioled, oblong, lyratiily 

 pinnatifid, 1 to 2 inches long : flowers in a very open raceme, spreading or deflexed : 

 petals linear, acuminate, 9 lines long : pods hdille-shaped, 6 to 8 lines long, 4 to 5 

 wide, pubescent : stigma dilated, depressed. — Lund. Jour. ]iot. iv. 70, t. 4. 



Collected only l)y Coulter, the inecise loeality unknown ; pn)l)a])ly in S. California or W. 

 Arizona. An immature specimen from C:i|)e San Lueas {X<mlus) is perhaps distinct, having 

 shorter petals, with a dilated blade, and a less depressed conical stigma. 



L. Palmeri, Watson, Pioc. Am. Acad. xi. 123, from the Big Canon of the Tantillas Mountains, 

 below San Diego, differs from the original type of the genus in its reniform-obcordate pod, 4 to 5 

 lines wide, with 2-seeded cells ; upper seed horizontal, tlje lower pendulous : petals linear. 



