Thysannciirjms. CKL'CIFKU.K. "II3 



nither unsatisftictorily separated by its l-ccllcd. 2- i-c.vuKd, l-seeded fruit; iIim 

 silicids falling off without dehisc-eiicc hut [lossessiiig v:ilvcs, which divido n-ruhirlv 

 under the prolonged influence of moisture. From the European genus Vlypenln 

 of similar hahit it is technically separated by the absence of any meml>ranou.H c»r 

 tooth-like appendages upon the filaments. — ; Bull, Calif. Aca<l. Sci. i. 72 ; Pranll 

 in Engl. &. Prautl, Nat. PHanzenfam. iii. Ab. 2, lUl. [By B. L. Roiunson.] 



A. pusillus, Gkeknk, 1. c. Hirsiite-tomentose, braiiclieil from near thn haso, .3 to 9 iiidu'.H 

 hi^li ; branches subsiinplo, spreading, tcrminatiupj in elongated racemes: leaves ulilancc- 

 olate, obtuse, toothed or piuuatifid, 4 to 6 lines long, forming a rosette at the luLxe ; the cauline 

 more or less reduced : ])edicels 1 to 1^ lines in length, recurved : flowers very small : iK-talx 

 minute, linear, or wanting: fruit f to 1 line in diameter, usually rovered witli spreading 

 uncin:ite hairs. — Tli i/sanocar/ms iiitsillus, Ilouk. Ic. t. 42; Torr. & Grav, Fl. i. 1 1 9. 

 7\ oblongifolius, Nutt. iu Torr. & (iray, 1. c. 118. — Dry liillsides from San Diego, OrcutI, 

 to 15rit. Columliia, Muconn ; common. 



Var. glabrior, Watsox, in herb. Leaves thin, nearly smootli, at le!u«t not hirsute ; fruit 

 ciliated I)ut glabrous upon the faces. — Growing witii the tyi)ical form near Fort Mohave, 

 J. (I. Lciiuiioii, April, 1884. A form with pods smooth and free even from ciliaiinn l.a- lie. n 

 collected near San Francisco, Mrs. Biandegee. 



3. THYSANOCARPUS, Hook, (©i^o-avov, fringe, and KapTr,.^, inut.; - 

 Slender erect annuals of the Pacific Slope, with subsirnple or branche<l stmis, 

 minute white or purplish fiowers, and very characteristic disk-shaped or concave 

 indehiscent one-celled fruit; the latter often toothed like a cog-wheel or per- 

 forated near margin by a series of openings. — Fl. Bor.-Am. i. G9, t. 18, f. A; 

 Benth. & Hook. Gen. i. 94; Brew. & Wats. Bot. Calif, i. 48, excl. T. pusil/ns. 

 [By B. L. RoiiiNSON.] 



* Stem profusely l)rauched ; branches spreading at a considerable angle, commonly again 

 once or twice branched : petals purplish or white, considerably exceeding the ealyx ; pud.s 

 small (1^- to 2 lines in diameter), often strongly concave and boat-shaped with a comiiiplu 

 catc divided or perforated wing. 



T. conchuliferus, Greene. Glabrous throughout, glancons, 4 to 8 inches in height: 

 leaves linear or lance-linear, sagittate-auriculate, runcinately toothed or ])arted ; teeth 2 to 4 

 pairs : racemes 1 or 2 inches long, rather densely niany-flowercd : jjcdicels 2 to 3 lines long, 

 spreading horizontally and gently recurved : pod markedly cymbiform, finely, reticulattnl 

 but quite glabrous. — Bull. Torr. Club, xiii. 218, & Pittouia, i. 31; K. Hrandegee, Zoe, 

 i. 1^2. —Rocky soil on the Island of Santa Cruz off coast of S. California, Greme, 

 Bnvideiiee. 



Var. planilisculus, Robinson, n. var. Fruit plano-convex or sliglitly concavo- 

 convex, not perceptibly reticulated but hirsute upon both sides: pedicels 4 to 6 lines long. 

 — Island of Santa Cruz with type, T. S. Biandefjee, April, 1888. 



♦ * Stems simple or with a few subsimple elongated nearly erect branches: po<ls 2 to 4 

 lines in diameter, jilano convex, rarely a little concave on one side; wing entire, ilivide<|, 

 or perforated: flowers very small: petals little exceeding the calyx: ujiper leaves 

 narrow. 



T. CUTVipes, Hook. Commonly more or le.*s hirsute below, 8 to 12 inche.'* in height : ba.*al 

 leaves msnhite, often persisting, oblong, jiinnatifitl with short blunt lobes or merely dentate ; 

 up])er leaves lanceolate or linear-lanceolate, sagittate ;iuriculate and clamping nt l>a>i ' — 

 (6 to l(» lines in length): pedicels very slender, 14 to 3 lines long. le:(ving the axis :i' 

 angles and strongly recurveil : fruit subject to much variation. 1 to •2\ lines in •!! 

 (including wing), tomeiitose or glabrous; wing narrow <.r liroa<l. usually entire, s.inutim..^ 

 crenate or with a few perforations, sometimes involute (var. i>voi,i':ris, Gjoodc. Fl. 

 Francis. 27.')) — Fl. 15or.-Am. i 6<t, t. 18, f. .\; Torr & Gray, Fl. i. 118; Brew. & \\M». 



