293 



RHUS LAURINA Nutt. 



leaves glaucous, entire: panicles 2-4 In. 

 long. Shrub 8-15 ft. high. 



Genna TRIFOLIUM Linnaeus. 



An or per herbs with palmeately 3- 

 foliate Ivs; Ifts usually denticulate: 

 stipmes adnate: fls in capitate racemes, 

 spikes or umbels, rarely few or solitary, 

 on more or less elongated axy or ter- 

 minal peds: ex 5-cleft with nearly equal 

 teeth, persistent: pet persistent, all more 

 or less adnate to the staminal tube by 

 their claws, or the standard sometimes 

 free; wings narrow; Keel mostly obtuse: 

 sta diadelphous: pods membranous, 

 shorter or slightly exceeding the ex, 1-6- 

 seeded, dehiscent or indehiscent . 

 TBIFOLITJM AMPLECTENS T. & G. 



Glabrous, erect, branching: Ifts obo- 

 vate-cuneiform, mucronately denticulate; 

 stipules ovate, scarious, entire, aristate- 

 mucronate; peduncles shorter than Ivs; 

 inv about half the length of the 5-6-fld 

 hd, 4-5 parted; seg somewhat lobed, 

 obtuse; ex much shorter than the cor, 

 cleft almost to base; teeth subulate, 

 very unequal; vexillum free, covering 

 the wings; legume sessile, 6-seeded. 



"California, Douglas! Plant 4-6' hi: 

 Ifts very sm. on slender petioles: pe- 

 duncles axy: hds less than %' diam: inv 

 scarious: upper teeth of ex very short, 

 about one-third the length of the oth- 

 ers." T & G, Fl NA 1:319 (1838). 



Brandegee, Zoe 1:113. Cat. 



Cruz; Guad; Sonoma Co to Chili. 

 TRIPOLIUM BZFZDVM A. Gray. 



"Somewhat villose or glabrous; sts 

 from sm (ann?) rt, slender, spreading; 

 stipules ovate-lanceolate , setaceously- 

 acuminate, entire; Ifts linear-cuneate, 

 lateral ones rarely dentate, bifid or in- 

 cised at the apex with a mucronate point 

 between the lobes; ped twice or three 

 times as long as the Ivs; hds naked, 6-12 

 flo. or more; fls pedicelled, at length re- 

 flexed; ex five-parted, dentate, subulate- 

 setaceous, somewhat nirsute and nearly 

 eciual to the persistent, rose-colored 

 scarious cor. 



"Near Marshe's Ranch. between 

 Monte Diablo and the San Joaquin (Con- 

 tra Costa county, California) among 

 frass in a ravine near the water, May 

 9 (collected by Brewer)" Gray, Cal. 

 ac pr 3:102 (1884). 



Abrams, PI LA 212. Morgans station 

 (Davidson). 



Brewer & Watson, Bot Cal 1:129. Ore- 

 gon. 



Davidson, PI LA Co 4. 

 TRIPOLITJM CZZ.ZOZ.ATUM Bth. 



Abrams, Fl LA 212. Common on 

 grassy hillsides and in the valley. 



Columbia river; Cruz (Greene); SBer 

 hills (Parish 822); SD! Baja!. 



Bentham, PI Hartw 304 (1848). 



Davidson, PI LA Co 4. 



Trifolium ciliatum Nuttall, PI Gamb 

 152 (1848), not Clark. 



Brewer & Watson, bot Cal 1:129. LA 

 to the Columbia. 



See T. ciliolatum. 



"Ann: smooth and erect, but little 

 branched; lower Ivs on very long pe- 

 tioles; Ifts cuneate-elliptic or oblong, ob- 

 tuse, minutely and sharply serrulate; 

 bracts adnate, subciliate, herbaceous, 



294 



entire and acutely acuminate; capituli 

 axillar and terminal, rounded, many-fld, 

 destitute of involucrum, but subtended 

 by a cicatrised circle of points; the fls 

 attached to a cylindric torus, often end- 

 in^ in a long subulate point beyond the 

 capitulum; seg of the ex unequal, one 

 of the teeth sm, the rest lanceolate, 

 sharply acuminated and bristly ciliated 

 with stiff hairs; vexillum enclosing the 

 other pet, which are sm; legume flat, 

 stipitate, about one-seeded: stipules her- 

 braceous; Ivs rather thick and strongly 

 veined, with forked vessels; ex nearly 

 the length of the ochroleucous fl. This 

 is again a Physantha, but without a 

 proper involucrum. Hab Pueblo de los 

 Angeles, Upper California." Bentham, 

 PI Hartw 304 (1848). 

 TRIPOLIUM DECODON Greene. 



"Size of the foregoing (brachyodon) 

 and nearly allied, the slender branches 

 firmer, p'ish: Ifts all broad and short, 

 few exceeding *4' long, many much 

 shorter, obcordate to cuneate-obovate 

 and oblong cuneiform .emarginate to re- 

 tuse, truncate or nearlv obtuse in the 

 uppermost, all with about 5 minute but 

 salient teeth in each margin; slender 

 wiry poduncles more than twice the 

 length of the Ivs; hds *4' broad at fl'ing, 

 the cor dark-p; divisions of inv 7 or 8, 

 oblong or oval: ex-teeth short, subulate- 

 setaceous; corollas widely inflated in 

 age. 



"Collected by Brandegee at SD, 20 My, 

 1903, and distributed by C. F. Baker un- 

 der n. 3371. Species remarkable among 

 members of this section of Trifolium for 

 its broad and short Ifts." Greene, Pit- 

 tonia 5:108 (1903). 



TBIFOLITJM DEPAUPERATTJM Des- 

 vaux. 



Abrams, Fl LA 215. 



Low, diffuse, glabrous an, branching 

 from the base, decumbent, flaccid, 6-15 

 cm long, few-leafed: Ifts 1 cm long, cun- 

 eate-oblong, obtuse or emarginate, den- 

 . culate: hd long-peduncled, few-fld, inv 

 much reduced, with truncate short lobes: 

 cor less inflated, not at all runcate at 

 apex: pod 1-2-seeded: sds somewhat an- 

 gular, tuberculate-rugose. Sonoma Co; 

 Chili. 



Davidson, PI LA Co 4. 

 TRIFOLIUM GRACILENTUM T. & G. 



Trifolium denudatum Nutt; J ac Phila, 

 II, 1:152, t 24 (1848). 



"Nearly glabrous; st slender, erect or 

 ascending; middle Ivs on very long fili- 

 form petioles; Ifts cuneate-obcordate, 

 spinulose-serruiate; stipules rather foli- 

 aceous, the lower ones linear-lanceolate 

 and setaceously acuminate, the upper- 

 most ovate-lanceolate and shorter: hds 

 loose, 15-25-flw; ex glabrous; the teeth 

 lanceolate-subulate, setaceously acum- 

 inate, thrice the length of the tube and 

 about one-third shorter than the cor; 

 legume 1-seeded. 



"California. Douglas! Strictly ann: st 

 8-10' hi: petioles of the middle Ivs 4' 

 long; those of the lowermost and espec- 

 ially the uppermost Ivs much shorter: 

 hds as large as in T. repens: fls p." 

 T & G, Fl NA 1:316 (1838). 

 Variety ZXCONSFZCUTTM Fernald. 



"Much smaller than type, slender, 2-6' 



