38i5 coMrosnvK Buiua. 



ing from convex to low conical. B. intctjrifoliii is the older specific niinie uiuicr this genus, and 

 the better one, although Tru/iophi/lluin iiiuilijlorum was earlier imblisiied. 



5. B. gracilis, llouk. & Am. A span or so in heiglit, Lraiiched from tlie base, 

 slender : luavca narrowly linear and entire, or dilated above and 3-])arted or 3-Iobetl: 

 liwuLs sleniler-pudiinc-led, raLlier small : mya 5 to 7 : diak-corollas and akenes cou-snicu- 

 ously ylandular. — JJ. leucujj/ii/lla, in part, Eaton in Watson, Bot. King Exp. 173. 



Known thus far only from Snake Fort, interior of Oregon {Tolmic), and the not leniotc 

 Robert's Station, Nevaila, iralaua. Tolniie's plant has simple entire leaves, as far as known, 

 heml rather large in proportion, the involucre 4 lines high, and the receptacle low convex. The 

 variety collectetl by Watson is canescent with lino appressed wool, leav(!S mainly 3-parteil, nar- 

 rower and rather smaller heads, and a narrower conical receiitacle. It is likely to occur, in one or 

 both forms, in the northeastein part of the 8late. 



+- -J- J^tavcs luostly broader and with short (lud broader lobes ; 2^(i]>jius very short, 

 soiaetuues obsolete or ivaiUiiKj ! 



6. B. arachnoidea, Fiseher & Meyer. A foot or two high, loosely branched, 

 disposed to becoim; rather woody at base, (;lothed with loose floccose wool : leaves 

 dilated, varying from rhombic or cuneate in outline to oblong-lanceolate, mostly 

 tliin, 3-5-lobed or incised; the lobes or coar-se teeth mostly oblong: involucre 

 broadly cami)anulate or hemispherical (3 or 4 lines high): rays 10 to 13, large: 

 disk-corollas with very glandular-hirsute tube : receptacle low convex or sometimes 

 more elevated : akencs comparatively short and thickish, hardly longer than tlie 

 disk-corolla: i)a])pus of few or several very short scales, sometimes however longer 

 than the breadth of the akene, sometimes almost or i|uite obsolete. — Oray, PI. 

 Eeudl. 100. B. latifolia, iJenth. Bot. Sulpli. 30. 



Oiien and shady jihues, especially among Ikdwoods, common near the coast from Santa Cruz 

 to Menilocino Co. Leaves more fre(|uently ojiposite on the lower part of the stem and on steiile 

 shoots than hi the other species. Pappus sometimes reduced to a mere border, or even wanting 

 altogether. In a specimen of this sort, collected by Holander in the Mariposa Sccpioia grove, 

 quite beyond the ordiiiaiy ninge of this species, tlui leaves on the low llowering stt^ins are un- 

 usually narrow, no that the jilaiit might almost bo taken hir an cpaitpoBO state of /^ hitcgrifolut. 

 Hut tlie ludpcr tube of tiui disk-corolla, as usual in the present .speciea, is densely very hiisulo 

 with many-j(iinl<'d and sci^mingly glandular hairs. 



7. B. parviflora, (iray. A span or less higli, dilfusely branching, tloccose- 

 woolly, sh;nder : leaves linear-oblong or spatulate, 3 — 5-lobed, or the upper entire, 

 from half to a quarter of an inch or less in lengtli : involucre narrow, only 2 lines 

 long : rays 5 or 0, hardly longer than the disk : disk corollas nearly glabrous : 

 receptacle conical : aktuies somewhat fusiform, the outermost ndnutcly hirsute, the 

 inner glabrous : pappus of short nearly ecpial scales. — li. Wallacci, (Jray in J'roc. 

 J5ost. Soc. iS'at. Ui.st. vii. Mf), not of I'acif. Ji. \W\k 



Near Fort Tejon, Xun/us. The smallest of the genus. 



§ 2. Annual, Jlocctdose-woolly : leaves alternate, entire : scales of the involucre touted 

 hy their mari/ins into a earn] nmu late S-i)dobed cup: style-branches truncate: 

 scales of the pappus wholly nerveless. — I'sicuuo-MuNOLoi'iA, Uray. 



8. B. ambigua, Oray. ]More than a span high, slender, loosely branched ; the 

 branches terminated by .slender- peduncled small heads : leaves spatulate-linear or 

 oblanceolate, (entire, ta|)ering to tlie base, se.ssile : receptacle conical, narrow : rays 

 8 or 9, oval, hardly exceeding the ovate-lanceolate lobes of the involucre: tube of 

 disk-corollas liirsute : akenes linear or the outermost oblong-linear, jirismatic, 

 glabrous, or the outer ones slightly hairy : jiapjuis a crown of (J to 1) very slant 

 and obtuse hyaline scales, or sometimes none. — Lasthenia {Monolojiia) arublyua. 

 Gray, Proc. Am. Acad. vi. 547. 



Near Fort Tejon, Fh: Harti, 1864. Not sime met with. Lenves less than an inch long, 2 

 lines or less wide. InvohRie about 3 lines long ; the scales strictly in a single series and united 

 for two thirds of their lengUi into a rather narrow eampanulate cnji. Heceptacle minutely scro- 



