Apargidium. COMPOSIT.E. \;)\) 



Tuolumne to Mendocino Counties {Harbweg, Bigelcw, Bolandcr), also Cisco (Kellogg) ; thence 

 to the southern borders of Oregon (Pickering and Brackcnridge), in open pine woods, &c. 

 Remarkable lor the narrow retrorse lobes of the Laves, ami the abrupt summit to the akeues. 



These are nearly 3 lines long, while the well-formed beak attains the length of nearly an inch. 



* * * Root annual : plants mostly low and small, occasionally subcaulescent. 



7. T. Cliilense, ('ray, 1. c. More or less pubescent or hairy : leaves varying 

 from spatulate to linear-lanceolate, and from denticulate to laciniate-pinnatitid: scapes 

 Blender, a span or .sometimes nearly a foot high : involucre G to 9 lines high ; the 

 scales in about 2 series: akenes varying from short-oblong to fusiform and with 

 acute or wing-like ribs, or the outer sometimes 10-winged, usually one half or one 

 third the length of the filiform beak. — Macrorhynchus Chilensis, Less. Syn. 139; 

 liook. Lond. Jour. Lot. vi. 25(5. J/, heterophyttus (Xutt.) & M. Californicus, Ton-. 

 & Gray, Fl. ii. 41)3. A'i/ntiip/tnru heterophylki, Xutt. 1. c. ; the state with the outer 

 akenes mostly undulate-winged at maturity. Cryptopleura Calif ornica, Xutt. 1. c. ; 

 the occasional and evidently abnormal state, with some of the outer akenes fleshy- 

 thickened and the ribs obsolete. 



i >[>.!. grounds ; common throughout California and Oregon, extending through the interior to 

 Utah. Flowers deep yellow, expanding hut once at midday. A must variable species, especially 

 as to the akenes ; in some of the forms agreeing wholly with Chilian specimens. More Commonly 

 the akenes are rather shorter and their beak longer. The state of the akeues on which Nuttall 

 founded his ' 'ryptoph wra has been only once or twice met with. The rugose-winged state is not 

 uncommon, and in various degrees, or affecting merely some of the outer akeues. 



119. TARAXACUM, Haller. Dandelion. 



Head many-flowered. Involucre oblong-campanulate, of thin and narrow some- 

 what membranaceous scales in two sets ; the inner equal and erect in a single series ; 

 the outer short and calyculate, commonly loose. Receptacle flat, naked. Akenes 

 oblong or fusiform, angled, about 10-ribbed, attenuate at base, mostly murieate on 

 the ribs towards the apex, which lengthens into a long filiform beak. Pappus of 

 copious and white capillary scabrous bristles, nearly persistent. — Acaulescent 

 perennials or biennials (widely diffused over the world but mainly northern) ; with 

 fistulous naked scapes from the tuft of radical leaves, bearing a single rather large 

 bi '1 of yellow flowers, open through the morning. 



1. T. Dens-leonis, Desf. Leaves runcinate, the lobes toothed : outer scales of 

 the involucre loose or reflexed, the inner destitute of a callous horn at the tip. — 

 hyuiiiiihni 'I'" in. on- am, Linn. 



There are some indications of the Dandelion as an introdu 1 plant ; but it is as yet very local. 



The indigenous state, occurring in the Rocky Mountains and in Oregon, may be expected in the 

 mountains northward. 



120. APARGIDIUM, Torr. & Gray. 



Head rather many-flowered. Involucre cylindraceous, of several narrowly lanceo- 

 late and one nerved equal scales nearly in a single series, and a i'<-w short and loose 

 calyculate ones. Receptacle flat, naked. Akenes linear-oblong, columnar, glabrous, 

 not tapering at either end. Pappus of copious and unequal barbellate-denticulate 



capillary bristles, or the outer and smaller ones barely BCabrous, all rather fragile, 

 brownish. — A single species. 



I. A. boreale, Torr. & Gray. Stemless perennial, glabrous : leaves linear lai - 



late, elongated, obscurt I\ and remotely denticulate or entire ; scape slender, a span 

 to a fool high, bearing a single middle-sized head, Iding before opening : flowers 



