314 COMPOSn\E. Aplupappm. 



High Sierni Neviiik, at. Mono Piiss, I'yniiiiiil I'uak, Suinnut, kc, and tlirougli Nevada, llcud 

 nearly two thirds ol' an inch lung. 



13. A. Macronema, Gray, 1. c. Woody at base, seiuling up soiuewhiit siuii»lo 

 wliite-woolly Lranches, a span hij^li : loaves ublong-lineur or oblauceolute, viscidly 

 ghviuluhir-pubcriiloiil, imt rij,M(l : huads Icriuiiud aiul solitary or somewhat clnsturwl, 

 about 20-llo\vur(jil : iiivohioro broadly campanuhito, shurtur than tlio disk ; its iiinor 

 scales thin, lanceolato or linear ; the outer of equal length, more or less ioliaceous 

 or passing into leaves : rays jione : style-appendages lilitbrm and much exserted : 

 akenes linear, 5-nerved, somewhat pubescent : pappus, &c., as in tho preceding. — 

 Macronema discoidea, Nutt. 1. c. 



On rocks in the Sierra Nevada; Mono Pass, at 10,000 k^t (.Bolander) ; Mount Stanford, at 

 8,000 feet (Lcmmon) ; tlience east to Colorado or Wyoming. 



A. AKENAiiius, Benth., known only from Cape San Lucas, at the southern end of Lower Cali- 

 fornia, is quite out of our district. 



A. spiNULOSU.s, DC, with pinnately cleft leaves, the commonest species east of the Rocky 

 Mountains, occurs in CouUci's Californian collection ; but a part of it was made between Califor- 

 nia and Mexico, and this species was in all probability pickcil up in Arizona. 



A. NANUS, Eaton, fioni Nevada, a broader-lcaveil form of Ericamcria nana, Nutt. (which, as 

 the latter states, is near his E. resinosa), in its broader forms approaches A. suffnUicoiius, and 

 may occur in the northeastern part of the State. 



17. BIQELOVIA, DO. 



Heads coryniboso or cymoso-clustorod, rarely paniculate, 5 - 30-flowered, lioino- 

 gamous, tho ilowors being all jjorlect and with tubular corollas. Involucio imbri- 

 cated ; the scales dry, chartaceous or coriaceous, chiefly destitute of foliaceous or 

 herbaceous tips. Eeceptacle flat, foveolate or alveolate-dentate, rarely Avith a chaff- 

 like projection in the centre. Appendages of tho style-branches varying from ovate- 

 lanceolate to subulate or filiform. Akenes narrow, terete or angular, slightly if at 

 all compressed. Pa{)pus simple, of copious unequal capillary bristles as in Aplo- 

 pappus, or softer and more ecpial, tawny at maturity. — Herbs or undershrubs, with 

 narrow alternate leaves, and mostly small heads of yellow flowers (usually autum- 

 nal) ; all American and chiefly of tho United States. — CJray, Proc. Am. Acad. viii. 

 638, Linosyris, Torr. & Gray, &c. Chrysothaviiuis, (Nutt.) Benth. & Hook. Gen. 

 ii. 255, changed in appendix to Bigelovia. 



It appears that the genuine species of Linosyris, of the Old World, occasionally develop white 

 or purple rays, thereby showing that they belong to Galaldla, a subgenus of Aster. Tiiese 

 American plants are, on the other hanil, closely related to ytplopappus, from which some of them 

 (even of the Chrijsothamnus section, which is on the whole so well-marked) are only arbitrarily 

 separated. Bigelovia and Chrysol/uimnvs are strictly of the same genus, so that the former name 

 must be adoi)ted. The species are more numerous in the interior region than in California. Ours 

 may be most readily made out by means of the following analytical key, which is mainly founded, 

 however, upon the proper characters of the natural sections here represented. 



Scales of tho involiuiro not in consi)icuous vertical ranks. 



Style-aiipendages ovate or triangular-subulate, shorter than the stigma- 

 bearing jiortion. 

 Leaves spatulate or obhinccolato, toothed or lobcd : lieads half an 



inch long, I'i - 20-llowered. 1. B. Menziesii. 



Leaves (iliform or nearly so, entire.* 



Heads a quarter of an inch long, densely corymbed, 20 - 25-flowered : 



scales of involucre lanceolate, acute. 2. B. arbouescens. 



Heads fewer : scales of involucre oblong. 3. B. Cooimcki. 



Style-appendages very long and slender : liranches mostly white-woolly. 



Heads 20 - SO-tlowered, broad, leafy-br.acted (see above). Aj-lopappus Macronema. 



* B. diffusa, Gray {Ericameria diffusa, Benth. Bot. Sulpli., and Solidago diffusa. Gray, also Liiio- 

 si/ris Sonoriensis, Gray) belongs here. As it lias lieen fouiul only at the southern extremity of Lower 

 California and on the opposite side of the Gulf, it is not likely to come within our limits. 



