FERNALD. — GENUS PECTIS. 83 



& Deppe Jlde Lessing) ; Jalisco, Tequila (Palmer, 1886, no. 418); 

 Oaxaca (Galeotti Jide Hemsl.) ; Guerrero, Chilpancingo (Humboldt 

 & Bonpland j^'c?e HBK.), Acapulco (Haenke j/?fZe DC); Nicaragua 

 (C. Wright) ; Costa Rica, Guauacaste (Qi^rsted). 



Var. villosior, Coult. Low with thick woody caudex : stems aud 

 leaves villous or even lanate ; the involucral bracts puberulous or villous. 

 — Bot. Gaz. XX. 52. — Oaxaca, between Tatolapa and San Carlos 

 (Nelson, no. 2550) ; Guatemala, Santa Rosa (Heyde & Lux in Exsic. 

 J. D. Smith, nos. 3401, 3413). 



P. Liiebrnannii, Schz. Bip. Suffruticose at base, the elongated 

 slender procumbent branches 2 or 3 dm. long, the whole plant including 

 leaves and involucre canescent-tomentose or even lanate on the young 

 parts : the thick obovate-oblong revolute leaves cuspidate-mucrouate, 

 about 2 cm. long, 1 cm. or less wide, punctate beneath, with many small 

 black dots, and 2 to 4 (according to Klatt 6 or 8) long basal seta3 : pe- 

 duncles solitary, terminal or axillary, 6 mm. or less long, 2-3-bracteate : 

 involucre 6 or 7 mm. high, about 30-flowered ; the 6 or 8 linear-oblong 

 rosy-tipped bracts plane or somewhat involute, scarious on the margins, 

 canescent on the back, and slightly thickened below : rays yellow, ovate- 

 lanceolate, 3 or 4 mm. long : disk-pappus 20 or 30 unequal sordid up- 

 wardly scabrous setse, the longest 4 or 5 mm. long ; ray-pappus wanting : 

 akenes narrowly fusiform, 3 or 4 mm. long, minutely pubescent or gla- 

 brate. — Schz. Bip. in Hemsley, Biol. Centr.-Am. Bot. ii. 226 & in 

 Klatt, Leopoldina, XX. 92 (reprint 5), Southwestern Mexico. "Lag. 

 Lapotengo " (Liebmann, no. 471 Jide Klatt 1. c.) ; Jalisco, San Augustin 

 (Liebmann, no. 467). 



* * * * Aquatic subsimple plant with naked leaves and subsessile heads. 



P. aquatica, Watson. Stems smooth, elongated, simple, or sparingly 

 branched; leaves few, mostly above, thick, linear, entire, blunt, 2 or 

 3 cm. long, rarely with a few faint marginal glands : heads solitary in 

 the axils, becoming recurved with age: involucre about 1 cm. high, of 5 

 imbricated flat obtuse purple-ti[)ped blunt bracts, about 12-flowered, the 

 flowers mostly included: rays none: pappus of 10 or 12 unequal serru- 

 late bristles, the longest 2 mm. long and somewhat thickened, all ascend- 

 ing or converging at the tips : akenes compressed-angulate, very slender, 

 8 mm. long, with a long-attenuate base, appressed-setose with rufescent 

 hairs. — Proc. Am. Acad, xxiii. 279. Chihuahua, pine plains, base of 

 Sierra Madre (Pringle, no. 1296). A unique species, the stems floating 

 in ponds. 



