Trojndocarjnim. CKUCIFKlLi:. Ml 



B. pilosa, Hook. IVrcmiiiil, similar in lial.it to scapnse furins of the i.rocc<liiip sj.orios : 

 leaves densely clustered at the hase, linear-lanceolate, pilose ujioii hotli surfaces and inar;,'in, 

 chiefly with simple hairs: flowers considerahly larger than in the ht-^t, fragrant (od..r said' 

 to resemble that of the //7(;r). — Fl. Bor.-Ani. i 65, t. 17; Torr. & Crav, l-l. i. Ill; Seem. 

 Bot. Herald, 51. 1 /?. rosea, Bunge, Del. Seni. Dorp. I83'J ([.iniiiea, Lit.-Ber. 1840, 1 IH). — 

 "Sandy shores of the Arctic vSea at the mouth of the Mackenzie I{iver," Dr. Ui.'hanhon ; 

 coast west of Cape Bathurst, Pulltn, ace. to Scemann. 



B. humilis, Hohixsov, h. sp. I'uhescent throughout with hrauched hairs: root single, not 

 strongly thickened : stems .several, si)reading-asceniling, simple or not infreijuentlv l.ranclied, 

 leafy, 2 inches to a sjjan high, terete, slender, wiry : leaves linear-oblong or spatulate, sul>^ 

 entire to shallowly sinuate-pinnatifid, chiefly basal ; the eauline rather small and remote: 

 flowers small, white or purplish : potls linear, terete, more or le.ss torulo.se, erect. 5 to 'J lines 

 in length; septum nerveless. — .SIsijmbrinm hiimile, C. A. .Mey. in I.edeb. Fl. Alt. iii. i;}7 ; 

 Fournier, Sisyml). i;5G; Ledeb. Ic. t. 147. Arnhis jietni tt. Hook. Fl. Bor.-Am. i. 4:i ; (;rav,' 

 ]Man. eds.^ 1-5; not Lam.. /(VA; Wats. Bot. Gaz. xii. 200. — Willoughby Mt., Vermont! Mmin, 

 Dcmie, Grout & J'Ji/i/lfstnn, &e. ; Anticcsti, Pursh, Macoim, to Oregon, and northward to 

 Alaska, 6'/o«ey. (Siberia.) A species in habit, pubescence, and technical characters (jniie 

 as near IJrui/a as Sisyinbrium, and possessing the characteristic septum of the former genus. 

 Dr. Watson iu an herbarium note has expressed the opinion tiiat the American plant is 

 distinct from the Asiatic, but in what characters does not aj.pear. 



29. TROPIDOCARPUM, Hook. (Tp6m,, keel, and Kap7r6,, fruit, from 

 the carinate valves of the capsules.) — A small Califoruian genus of slender erect 

 simple or sparingly branched more or less hirsute-pubescent annuals, reduci- 

 ble to three species. — Ic. t. 4.'5, 52; Benth. & Hook. Gen. i. 82 ; Davidson, 

 Erythea, ii. 179. — The fruit in T. duhium and T. cap-pandmm is highly 

 anomalous, even to the suggestion of monstrosity, and merits anatomical and 

 developmental study with more copious material. Aside from the fruit, satis- 

 factory characters for specific distinction are most difficult to define. The leaf- 

 outline, pubescence, length of pedicels, size of flowers, &:c., all vary gre:itlv but 

 as it seems independently of each other. [I>y 1>. L. Robinson.] 



T, gracile, Hook. Leaves shallowly or deeply pinnatifid ; .segments acutish, cleft or entire, 

 very variable in number, form, and size ; the eauline leaves gradually reduced ; the spread- 

 ing jiedicels axillary, 3 to 10 lines long: pods lance-linear to linear, strongly obcomjires.sed 

 throughout; style slender ; seeds in 2 rows. — Hook. 1. c. t. 43 ; Torr. & Grav, Fl. i. 94; 

 Torr. I'acif. R. Rep. iv. 66; Brew. & Wats. Bot. Calif, i. 44. T . scahriuscultim. Hook. Ic. 

 t. 52 ; Torr. & Gray, 1. c, ouly a roughish form. — Centr. and S. California, chiefly near the 

 coast. The septum of the fruit, not found by Hooker, appears to be regularlv present. 

 although very narrow. 



? T. dubium, Davidsox, 1. c. Closely similar in habit and foliage to forms of the preced- 

 ing: capsule linear, 2-celled and strongly obcompres.sed toward the apex, but 1 -celled and 

 with valves flattened below; both parts fertile; placentae 2. — W. California in vicinity of 

 Los Angeles, iVeiv«, Dariclsoii ; and Contra Costa Co. at Antioch. Branfierjee (collected 

 with T. (/racih); Byron Springs, Braudcfjee (collected with T. fjnirilc am\ T. cnpparidtum). 



?T. capparideum, Grisene. p'oliage mtich as in T. qrarile ; the upper leaves somewhat 

 more deeply parted and with longer subentire segments: fruit lance-oblong, 8 to 11 lines in 

 length, 2 lines in breadth, 1 -celled, O-nerved, 4-valverl, tipped with a slender .style; placentie 

 commonly 4, and seeils distinctly 4-seriate. — Pittonia. i. 217, & Fl. Franci.s. 278. — Alkaline 

 soil, Centr. California, at Lathrop, Lrmmnn, and Bvrnn Springs, Greenv, lirniidrqrr. The 

 fruit of this noteworthy plant is not only annm.alous iu the order, but nianife.<sts a tendency 

 to vary, being sometimes diviiled, sometimes .a.ssuming contorted forms, and commonly con- 

 taining a small capsule-like structure at the ba.se, as described and figured by Ma-^ters. (^iril. 

 Chron. New (2d) Ser. xvii. II, f. 1. However, many apparently fertile siiecimens have 

 been collected, and the species must lie retained .at lea.st until the de^el<>p^nent of the frnii 

 can have more careful siudv. 



