Bahia. COMPOSITiE. 375 



California, Douglas '. NuUall ! April. — Plant shrubby at the base, about 

 a foot high. Lower divisions of the leaves largest. Heads clustered, but on 

 distinct peduncles when in fruit. Involucre about two lines long. 



3. B. trifida (Nutt.) : stem and involucre closely arenose-woolly when 

 young; leaves alternate, cuncalc-oblong, closely sessile and partly clasping, 

 loosely toinentose beneath, 3-clc[l at the apex ; heads (small) in crowded 

 corymbs; scales of the obovoid involucre 5, broadly obovate ; rays 4-5, 

 broadly oval, small; achenia glabrous, or slightly hairy along the angles; 

 scales of the pappus 10-14, equal, oblong, obtuse, nearly entire. — NuU. ! in 

 trans. Amer. phil. soc. I. c. 



St. Barbara, California, NuUall! April. — Growing with the preceding ; 

 the heads about the same size. Leaves very numerous, about half an inch 

 long, nearly glabrous above. 



4. B. achillteoides (DC) : woolly-tomenfose throughout; leaves alternate, 

 cuneifonn, with a long attenuate base, bipinnatifid above ; the lobes (2-4 

 pairs) small, entire or toothed; heads (rather large) solitary, terminating the 

 sparingly corymbose branches or peduncles; scales of the globose very wool- 

 ly involucre about 10, ovate-lanceolate, acute; rays 8-10, oblong; achenia 

 hairy on the angles ; scales oval or oblong, somewhat unequal, laciniate- 

 toothed at the apex. — DC! prodr. 5. p. G37. 



California, Douglas! — SulFruticose, branched from the base. Leaves less 

 than an inch long, laciniate-bipinnaliiid. Heads not clustered. Rays 3-4 

 lines long. 



♦ * Herbaceous : heads solitary on naked simple peduncles. 



5. B. lanata (Nutt.) : stems mostly branched from the decumbent base, 

 lanuginous-tomentose ; leaves lanuginous-tomentoso beneath, alternate, or 

 the lower opposite, pinnatifid ; the uppermost often linear and entire ; heads 

 (large for the genus) on naked peduncles ; rays large ; achenia glabrous. — 

 DC! prodr. 5. p. G37 ; Null.! in trans. Amer. phil. soc. I. c. Achillea 

 lanata, Pursh,Jl. 2. 'p- 560. Trichophyllum lanatum, Nutt. gen. 2. p. 167; 

 Hook. ! fl. Bor.-Am. 1. p. 315; Fisch. Sf Meyer, 2nd ind. sem. hart. St. 

 Petersh. 1835, p. 51. Eriophyllum cnespilosum, Dougl. ! in Lindl. hot. reg. 

 t. 1167. Helenium lanatum, Spreng. syst. 3. p. 574. Phialis, Spreng. 

 gen. p. 631. 



/3. lenuifolia : stem slender and often simple ; heads smaller; divisions of 

 the leaves narrowly linear, entire, or often lobed. — B. lenuifolia, DC! I. c. ; 

 Nutt. ! I. c. 



Oregon, common from the Rocky Mountains to the Coast! (The B. fenu- 

 ifolia, DC was probably collected in Oregon instead of California.) — Stems 

 10-15 inches high, frecjuently branched above, with the peduncles somewhat 

 corymbose. Segments of the leaves 1-3 pairs. Involucre subglobose, com- 

 posed, as in the following species, of about 12 oval or oblong connivenl scales, 

 which are all clothed with a dense and intricate wool. Scales of the pappus 

 oblong and obtuse, somewhat uneijual, denticulate at the apex, often a little 

 united at the base. 



6. B. leucophylla (DC.) : lanuginous-tomentose throughout; stems branched 

 from the base, naked above ; leaves alternate and sometimes opposite, oblan- 

 ceolate or oblong-si)atulate, 3-cleft or lobed at tlic apex, or somewhat pin- 

 nately incised, or often (especially the upper) entire ; heads solitary on long 

 naked peduncles; raysol)long, rather large ; achenia glabrous. — DC! prodr. 

 5. p. 656. B. integrifolia, DC I. c. Trichophyllum integrifolium, Hook, 

 fl. Bor.-Am. 1. p. 316. T. mulliflorum, Null. ! in jour. acad. Philad. 



7. p. 37. 



