424 BOTANY. 



aAiLLAEDiA^ PINNATIPIDA, Torr. T. 8^ G., Fl. 2. 366.— Perennial, canes 

 cent; stem 8-15' high, leafy and sparingly branched; leaves 1-3' long, pin- 

 natifid, the lobes few, oblong-linear, acute ; heads 1-2' broad ; rays yellow, 

 or "purple toward the base;" pappus-scales lanceolate, the barbellate awii 

 not exceeding the purplish disk-flowers ; fimbrillge of the receptacle subulate, 

 not dilated at the base. — Nebraska and Arkansas to New Mexico and Arizona ; 

 Chihuahua, Mexico. A showy flower ; the rays in Dr. Palmer's specimens 

 are pure yellow and have the tube very long and slender. 



Palafoxia^ lineaeis, Lagasca. Suffruticose (!), cinereous-pubescent; 

 leaves linear or lanceolate, obtuse, with two obscure submarginal nerves be- 

 side the midrib; peduncles and slender concave-carinate involucral scales 

 beset with copious flesh-colored glands and rigid spreading white hairs; 

 flowers 10-12, flesh-colored, all tubular, the lobes hairy at the tips ; pappus 

 of 4-8 unequal linear scales, the very strong midnerve slightly excurrent. — 

 Plant a foot or more high; heads 8-10" long. New Mexico to California 

 and southward into Mexico. A form with much larger heads is noticed in 

 PI. Fendl.j p. 95, as occurring in California. 



Page 172. Ch^nactis stevioides, H. & A. The specimens have a 

 pappus of only four short obtuse scales. 



Page 173. Hymenopappus luteus, Nutt. Densely clothed with a fine 

 white (sometimes deciduous) wool; stems about a foot high, "several from a 

 thick caudex," corymbose at the top ; leaves mostly radical, 1-2-pinnately 

 divided into numerous narrow linear lobes 2-4" long; heads rather large; 

 involucral scales 8-12, oblong, scarious-margined, shorter than the disk; 



'GAILLAKDIA, Fougbeoux. Heads many-flowered, radiate; rays neutral, deciduous, many- 

 nerved, the apex trifid ; disk-flowers perfect, the tube short, the 5-oleft limb hispid with articulate usually 

 colored hairs. Eeceptacle convex, usually flmbrillate. Involucral scales in 2-3 series, from a rigid baso, 

 running into a leafy appendage longer than the disk. Branches of the style terminated by a long awl- 

 shaped hispid appendage. Achenia oblong or inversely pyramidal, villous. Pappus of 6-10 membranous 

 or hyaline scales, the midnerve produced into a slender awn. — North American herbs, more or less pubes- 

 cent or glandular. Leaves alternate, the lower ones petioled and often lobed, the upper sessile and entire. 

 Heads on long naked peduncles. Rays yellow, often saffron-colored or brownish-purple at the base. 

 Disk-flowers yellow or violet. 



2 PALAFOXIA, Lagasca. Heads 10-many-flowercd ; rays deeply 3-cleft, pistillate, sometimes im- 

 perfectly developed or wanting ; disk-flowers with a slender tube and a deeply 5-cleft expanded limb, 

 the lobes smooth or hairy at the tip, spreading or recurved, very narrow. Involucral scales oblong or 

 linear, herbaceous or membranaceous, at first approsscd, at length stellately spreading, much shorter 

 than the disk-flowers. Eeceptacle small, flat, naked. Branches of the style very long and slender, flat- 

 tish, glandular-pubescent. Achenia linear, slender, 4-angled, pubescent or hispid, crowned by a pappus 

 of 4-12 linear or oblong membranous scales, awnless, but with a strong midnerve, the outer achenia 

 partly inclosed in the involucral scales, and often with a shorter pappus.— Herbs or suffrutescent, Texan 

 and Mexican, branching, strigose or glandular-pubescent. Loaves mostly alternate, linear or lanceolate, 

 1-3-nerTed, obtuse, entire. Flowers white, flesh-colored or purplish. 



