i^Q2 COMPOSURE. Uulitrrtzia. 



6. GUTIERREZIA, Lagasca. 



Heads corymbose, small or rather small, lieterogamous ; the rays few and fertile ; 

 disk-llowers peri'cct (in one species apparently infertile). Involucre obovate or 

 cylindraceous, its scales coriaceous, with greenish tips, closely imbricated, the outer 

 ones shorter. licceptacle convex or conical, liays short. Ai)pen(higes of the 

 style lanceolate or linear, hispid. Akeues terete, often somewhat turbinate. l*ap- 

 pus paleaceous, viz. of 7 to 9 or more chaffy scales, commonly distinct, and those 

 of the ray-llowei-3 shorter than those of the disk (in some Eastern species short and 

 more or less united in a ring or crown). — Herbaceous or sud'rulescent, glabrous, 

 ol'ten resinous, much branched from the base, with narrow entire leaves, ami corynj- 

 boso or fasciculate-crowded mostly small heads of bright yellow llowera. — Torr. & 

 Gray, Fl. ii. 193; Benth. & Hook. Gen. ii. 250, excl. sp. Brachyvis, Nutt. 



Two or three othur species occur in Arizona, &c., but have not yet been found near the Califor- 

 nian bonlers. 



1. Gr, £uthaniice, Torr. & Gray, 1. c. ^lore or less woody at base, seldom 

 over a foot high : leaves narrowly linear, crowded : heads fastigiately corymbose 

 and crowded, or sometimes rather open-panicled : involucre turbinate, 2 lines long : 

 ilowers of the ray and disk each 3 to 9 : akeiies silky-pubescent : pappus of about 

 9 chall'y scales ; those of the disk-flowers linear or oblong-linear and obtuse, fully 

 half the length of the corolla, at least as long as the akene ; those of the ray shorter 

 and broader. — G. £uthairuce, divaricata, & Cali/urnica, Torr. & Gray, Fi. ii. 193. 

 Brack yr is, Nutt. 



Dry hills along the coast and the Contra Costa Mountains : the var. Califounica {G. Calif ornica, 

 Torr. k Gray, 1. c.) ; taller than the eastern form, and usually with thicker heads, containing 

 more numerous ilowers, and the pappus rather longer. Tejon Valley, Dr. lleermann: a low form 

 with tlie fewest-flowered heads \g. vncrophylla, Durand k Hilgard, PI. lieerm. 40, — a lapsus 

 iorO. microccpluila), wliich i^xteiuls from W. Nevada {JFalson, kc.) to t\w east of the Rocky 

 Mountains. These are two extremes of n])parently one variable and wide-spread species. -- G. 

 microcephida, (liny, with which the Tejon iilant was confounded, hns still narrower, more cylindri- 

 cal, and smaller heads, with mostly a single disk-flower, and that iid'ertile. 



2. Gr. linearifolia, Lagasca ("?). Suffruticose or herbaceous, 1 to 2 feet high : 

 leaves narrowly linear : heads loosely corymbose : involucre obovate, 3 lines long : 

 akenes minutely appressed-pubescent : pai)pus of about 12 oblong and obtuse or 

 spatulate chalfy scales hardly longer than the proper tube of the corolla. 



Near Los Angeles, Dr. Gamhd. — In the size of the heads and in the pappus this accords 

 tolerably well wkh a specimen in Berlandier's collection, No. 1300, from San Luis Potosi, Mexico, 

 — which may be the obscure original of the genus, G. liuearifulia. Yet the Ilowers arc as many 

 as 5 to 8 in both ray and disk. It resembles the Chilian G. paniculata ; but in that the scales 

 of the pappus are narrowly lanceolate and nearly equal to the disk-corolla. 



7. AMPHIACHYRIS, Torr. & Gray. (Sect, of Bkacuyius, DC.) 

 Heads corymbose or fascicled, small, heterogamous ; the rays fertile ; disk-flowers 

 hermaphrodite but wholly or mostly sterile. Involucre obovate or cylindraceous ; its 

 scales rather few, coriaceous, closely imbricated, the outer successively shorter. 

 Ivecoptacle convex. Kays 1 to U) : disk-flowers from 5 to 20 : appendages of the 

 style in the latter oblong, obtuse. Akenes terete, pubescent. I'appus of the ray- 

 flowers chaffy and coroniform-concreted ; of the disk-flowers setiform rather than 

 paleaceous, the very narrow scales or flattish bristles about the length of the corolla 

 and commonly more or less united at the base. — Low and bushy-branched gla- 

 brous plants, with entire subsessile leaves and yellow flowers. — Gray, Proc. Am. 

 Acad. viii. C33. 



