1)5() BOTANY. 



one much longer than the others, 4' long and 3" wide ; upper leaves sessile, 

 3 -parted ; outer series of involucral scales lanceolate, ciliate, as long as the 

 broadly margined inner series. Flowers in my specimen are all too young. 

 Mr. Watson has kindly compared it for me, and pronounces it the same as 

 1233 of Mr. Wright's collection. 



Laphamia Stansbukii, Torr. — Utah. 



" Laphamia megalocephala, Watson (Arner. Naturalist, 7, 301). — 

 Scabrous-pubescent; stems diffusely branched, a foot high ; branches sim- 

 ple ; leaves alternate, broadly ovate, 2-3 lines long, smaller upon the 

 branches, entire, very shortly petioled ; heads large, 2-3 lines in diameter, 

 terminal and solitary, discoid, many-flowered ; achenia compressed, hispid ; 

 pappus none. — With nearly the habit of the last. Nevada." I have 

 quoted the description from Mr. Watson. The specimen I have not seen. — 

 Plate XI. Figure 1. A branch, natural size. 2. A single flower. 3. Style 

 and stigma. 4. . 5. Stamen. Enlarged about 10 diameters. 



Perityle * Emoryi, Torr. (Bot. Mex. Bound, p. 82). — "Sparsely hirsute 

 as well as glandular : leaves round-cordate or fan-shaped in outline, 5-9- 

 cleft and the lobes copiously incised, the upper alternate and less lobed : 

 scales of the involucre rather broad : rays short, white, broadly oval : style- 

 appendages oblong and obtuse: akenes narrowly oblong, hispid- ciliate: 

 awn of the pappus only one, very slender, sparsely barbellate above" 

 (Gray in Fl. Cal. 1, p. 397). I have not seen the species. Arizona. 



RiDDELLiAf Cooperi, Gray (Proc. Amer. Acad, vii, p. 358). — "A foot 



* " Perityle, Bentli. — Heads many-flowered, with pistillate rays, or occasionally none ; the flowers 

 all fertile. Involucre campanulate, of nearly equal scales, slightly carinate on the back, in a single or 

 double series. Receptacle flattibh or conical, naked. Rays 3-toothed ; disk-corollas 4-toothed ; the tube 

 glandular. Style-branches tipped with (or insensibly changing into) a short and obtuse or more com- 

 monly subulate or filiform, bairy appendage. Akenes oblong, flat (laterally compressed), dark-colored, 

 bordered by a cartilaginous mostly ciliate-bearded margin. Pappus a series of hyaline or setiform 

 scales, usually more or less united into a cup or crown, and commonly a slender awn from one or both 

 margins. — Rays white (or sometimes yellow?): disk-flowers yellow." — Guay, Fl. Cal. 1, i>. 39C. 



t Riddellia, Nutt. — ''Heads several-flowered, with 3 or 4 pistillate rays and 5 to 12 disk- 

 flowers, all fertile. Involucre narrow, cylindraceous, of 4 to 10 linear-oblong and coriaceous equal 

 woolly scales, which are connivent but distinct, except at the very base, and a few thinner or scarious 

 ones within, sometimes a narrow external bract or two. Receptacle flat, naked and smooth. Rays 

 largo for the size of the head, very broad, abruptly contracted at the base into a short tube, truncate and 

 3-lobed at the end, 5-7-nerved (tno nerves converging and uniting in pairs within the lobes), becoming 

 papery, persistent on the akeue. Disk-corollas elongated-cyliudraceous, with a very short proper tube. 

 5-toothed at summit; the teeth glandular. Anthers linear, minutely sagittate, or emarginate at base. 



