176 MR. NUTTALL'S DESCRIPTIONS OF NEW 



lower ones irregularly repand toothed, about half an inch wide; on the stem, except 

 at the base, amplexicaule ; young shoots and branches softly tomentose as in a 

 Gnaphalium; peduncles very long and tomentose, one-flowered. Flowers yellow and 

 showy. The involucrum of about eight to ten ovate, acute, greenish leaves, in a 

 single series, divided nearly to the base. Rays eight to ten, cuneate-oval, entire, or 

 two or three toothed, a little longer than the disk, furnished with obtuse, smooth 

 stigmas, and a small, indistinct toothed appendage behind the stigmas. Florets of 

 the disk with a narrow smooth tube, the teeth on the inner margins furnished with 

 numerous threads, which when moistened extend themselves, and appear numerously 

 jointed. All the florets in this plant are fertile. Achenia without pappus, obovoid, 

 compressed, four-angled, a little pilose, the central angles much less salient. 

 Receptacle conic, covered with elevated points, on which the seeds have been seated. 

 Hab. Pueblo de los Angeles, Upper California. Flowering in April. 



ACHYRACH.ENA. 



A. MOLLIS. A small slender annual, bearing a terminal and sometimes two or 

 three lateral capituli ; root leaves smooth, the rest linear-lanceolate, sparingly toothed, 

 attenuated below into a longish peduncle, covered sparingly with a silky pubescence. 

 The involucrum of six lanceolate silky leaves, embracing the three-toothed radial 

 yellow florets nearly to their summit ; the inner scales of the involucrum ten to 

 twelve, lanceolate, and membranaceous nearly to their summits. Radial florets with 

 long exserted styles, and filiform, rather acute stigmas. Achenia of the ray without 

 pappus, those of disk numerous, elongated, narrow and compressed, with ten rather 

 scabrous ribs. Pappus of the discal florets very long, convolute in two series of 

 about eight to ten scales, the outer shorter, all eroded and truncated at the apex. 

 One of the true Madie^, and in some respects allied to Lagophylla, in the involucrum 

 palea and rays, and to Anisocarpus in the chaff of the discal florets. 



Hab. Pueblo de los Angeles, Upper California. Flowering in April. 



ERIGERON. 



E. *STENOPHYLLUM. Nearly smooth, stem even and cylindric, corymbose at the summit ; leaves filiform, 

 rather numerous and scattered, minutely scabrous ; involucrum about three series, scales linear- 

 lanceolate, acute; rays numerous, elongated, (thirty or more,) two to three toothed; pappus fulvous, 

 scabrous, with an outer short white series ; achenia nearly smooth and compressed. 



Two to three feet high, with a very smooth cylindric stem, and numerous scattered 

 filiform leaves ; flowers white and rather large, (about the magnitude of the common 

 Daisy,) branchlets sometimes more than one-flowered, corymb of about seven to ten 

 branchlets. 



Hab. In California, (Monterey ?) 



