Grindelia. COMPOSITiE. 249 



a. cauline leaves entire or nearly so. — G. nana (3. integrifolia, Nutt. ! in 

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



13. leaves spinulose-toolhed. — G. nana, Nult. ! I. c. 



California, Capt. Beechey, Oregon near Fort Vancouver, Nuftall! — 

 Stems 5-8 inches high, numerous from a perennial? root. Involucre nearly 

 as in G. squarrosa. Pi.ays about 16. 



10. G. discoidea (Nutt.) : herbaceous, perennial, glabrous ; stems several 

 from the same root, slender, fostigiately branched ; leaves oblong-linear, 

 tapering to the base, sessile, somewhat spinulose-serrulate above ; heads 

 small; scales of the involucre with short su!)ulate squarrose-recurved appen- 

 dages ; pappus of 2 bristles ; rays none. — Nutt. ! in trans. Amer. phil. soc. I. 

 c. p. 315. 



Banks of the Oregon, Nuttall! — Heads rather smaller than in G. squarrosa, 

 terminating the slender stems (a foot high) or branches. Leaves 2-3 lines 

 wide. 



52. PENTACHiETA. Nutt. in trans. Amer. pli'd. soc. {n. ser.) 7. p. 33G. 



Heads many-flowered ; the ray-flowers ligulate, numerous, in a single se- 

 ries (in 2-3 series, Nutt.) ; those of the disk tubular, perfect and fertile. In- 

 volucre hemispherical ; the scales lanceolate, mucronate-acuminate, mem- 

 branaceous, with broad scarious margins, loosely appressed and imbricated 

 in 2-3 series. Receptacle convex, naked, areolate. Corolla of the ray ob- 

 long; of the disk tubular-infundibuliform, slightly incurved (the proper tube 

 very short), unequally 5-cleft at the summit, the sinuses of the exterior lobe 

 deepest ; the lobes oblong-lanceolate, spreading. Anthers (naked at the 

 base) tipped at the apex with a mucronate appendage. Branches of the 

 style in the ray-flowers linear, glabrous, slightly exserted beyond the tube, 

 stigmatose to the summit ; of the disk consisting of a very short and flat stig- 

 matic portion, terminated by a long subulate-filiform strongly barbellate- 

 hispid appendage. Achenia oblong, hirsute, obscurely 5-angular. Pappus 

 of the ray and disk similar, consisting of 5 elongated rigid scabrous bristles 

 slightly dilated (and obscurely connected ?) at the base, persistent. — A small 

 and slender much branched annual; the branches terminated by solitary 

 heads. Leaves alternate, numerous, sessile, filiform-linear, involute when 

 dry, and like the stem furnished with scattered villous hairs, otherwise gla- 

 brous. Flowers golden yellow. 



P. aurea (Nutt.! I.e.) 



St. Diego, California, in dry plains near the sea. Flowering in April. — A 

 very elegant, though often minute plant, from 2-3 inches to a foot high, branch- 

 ing usually from the base in an umbellate manner. Head about the size of a 

 daisy, almost orange-yellow, with 20-50 rays much longer than the disk. . . 

 Habit of some of the Chilian species of ChcEtanthera. Allied to the Mutisia- 

 cese, but with the stigma of Aster. Nuttall. — Involucre almost exactly as in 

 Bradburia (which it also resembles in foliage and habit), but with fewer 

 scales, with the central portion greenish. Rays simple, 4-nerved. Bristles 

 of the pappus as in Elephantopus, but more abruptly dilated at the base; 

 the habit also (not unlike some Pectideae) and bilabiate corolla of the disk, 

 would seem to indicate an affinity with the Vernoniaceae. But the style is 

 VOL. II. — 32 



