290 DESCRIPTIONS OF NEW SPECIES 



linear entire, the radical and lower ones spathulate, serrate towards the apex. 

 Liguli conspicuous, purple; disk yellow. Pappus rufous. Allied to Hete- 

 rotheca, but with the rays neuter, the pappus simple, and the flowers hetero- 

 chromous. 



Corethrogy7ie ^incana.., arachnoidly tomentose, leaves oblong-lanceolate, or 

 linear, acute, amplexicaule, nearly entire; branches slender, one or few flow- 

 ered, fastigiate; involucrum viscidly pubescent, of about four series of acute 

 sepals, the lower ones squarrose; rays about twenty, as long as the disk. — 

 Hab. Near St. Diego, Upper California. Flowering in May. Rays of a fine, 

 light bluish purple. Stems numerous, about twelve to eighteen inches long, 

 very leafy, branching above; branches slender, one to three-flowered; lower 

 leaves somewhat three-nerved. Capitulum about the size of the common 

 Daisy; the involucrum viscid, and sometimes the extreme branchlets; sepals 

 linear-lanceolate. Rays tridentate, without any distinct germ or pappus. C. 

 Californica? Dec A.NI). Diplopappus incanus, hmi). Aster? tomentellus? (Hook. 

 and Arn. Bot. Beechy.) With the heavy aromatic odour of some Gnapha- 

 liums. 



Corethrogyne * Jilaginifolia, arachnoidly tomentose, radical leaves spathulate, 

 serrate, those of the stem linear, or spathulate, acute, entire, sessile; branches 

 one-flowered, fastigiate; involucrum in about three series of lanceolate, very 

 acute, erect sepals; ray's twenty to twenty-four, bidentate, scarcely as long as 

 the disk. Aster? filaginifolius. Hook, and Arn. Bot. Beech. — Hab. Around 

 St. Barbara, Upper California. 



Obs. — A smaller flowered, more slender species than the preceding, with a 

 smaller and not viscid involucrum, the leaves more whitely tomentose. — In 

 neither of these species have we observed any palese on the receptacle, as de- 

 scribed by Decandolle, and, in consequence, they were referred to Aster by 

 Hooker and Arnott. 



ASTER. (Linn.) 



Aster ^Andinus, root-stock slender and creeping; stems several, decumbent, 

 above pubescent, mostly one-flowered; leaves entire, smooth, radical spathu- 

 late, sublanceolate, cauline sublinear, acute, usually wider at the base and am- 

 plexicaule; scales of the involucrum linear, nearly smooth and mostly acute^ 



