66 PROCEEDINGS OF THE AMERICAN ACADEMY. 



about the akene : receptacle uaked : ray-flowers fertile, the rays yellow, 

 rarely purple or white ; disk-flowers perfect, the corolla 5-lobed, more or 

 less bilabiate : style hispidulous, the short branches obtuse and without 

 appendages : pappus of a few or many pales or awns or bristles, or 

 reduced to squamellie or to an auriculiform crown, or rarely wanting : 

 akenes linear, terete or somewhat angled, generally pubescent, becoming 

 glabrate. — Syst. Nat. ed. 10, 1221, Amoen. Acad. v. 407 & Gen. ed. 6, 

 no. 963 ; Poir. Diet. v. 119 ; HBK. Nov. Gen. & Spec. iv. 261 ; Cass 

 in Diet. Sci. Nat. xxxviii, 202 ; Less. Linngea, vi. 708 ; DC. Frodr. v 

 98 ; Gray, PI. Fendl. 01, PI. Wright, i. 82, & Proc. Am. Acad. xix. 43 

 Benth. & Hook. f. Gen. ii. 412; Hemsley, Biol. Centr.-Am. Bot. ii. 224 

 Baker in Mart. Fl. Bras. vi. pt. 3, 285 ; Engl. & Prantl, Nat. Pflanzf. 

 iv. Ab. 5, 266. Seala, Adans. Fam. ii. 131. Lo7-entea, Lag. Gen. et 

 Spec. Nov. 28 ; Less. LinntEa, v. 135 ; DC. Prodr. v. 101. Slammarium, 

 Willd. in Less. 1. c. in syn. ; DC. Prodr. v. 102, as section. Crypto- 

 petalon, Cass. Bull. Soc. Philom. jan. 1817 & Diet. Sci. Nat. xii. 123. 

 Chthonia, Cass. Bull. Soc. Philom. (1817) 33 & Diet. Sci. Nat. ix. 173. 

 Pectidium, Less. Linn^a, vi. 706 ; DC. Prodr. v. 98. Belioreos, Raf. 

 Atl. Jour. (1832) 145. Pectidopsis, DC. Prodr. v. 98 ; Torr. & Gr. Fl. 

 ii. 62. Cryptopetalum, DC. I.e. 101, in syn. C%e2;7oc?/sc2<s, Triana, Ann. 

 Sci. Nat. ser. 4, ix. 36. 



§ 1. EuPECTis, Gray. Pappus (at least of disk) of comparatively 

 large pales witli or without terminal awns, or in one section with the 

 pales often splitting away from the bases of the awns : involucre of 4 to 

 10 bracts. — PI. Wright, i. 83 & Proc. Amer. Acad. xix. 44, in part. 

 Se.aki, Adans. Fam. ii. 131. Lorentea, Lag. Gen. et Sp. Nov. 28 ; Gray, 

 PI. Wright, i. 83, in part. Chthonia, Cassini, Bull. Soc. Philom. (1817) 

 33, & Diet. Sci. Nat. ix. 173. Pedis, Less. Linna^a, vi. 708, in part; 

 DC. Prodr. V. 98, in part. 



* Pales few (4 to 6 in disk, 2 or 3 in ray). 

 -1- Pales all attenuate or prolonged into awns or subulate tips. 

 ++ Erect or diffuse, involucre 4-6 (usually 5)-bracteate : awns of the pappus with 

 permanent paleaceous bases. 



P. ciliaris, L. Slender, erect and sparingly branched or diffuse, 1 

 to 4 dm. high, the somewhat tetragonous stems smooth or sparingly pu- 

 berulent above : leaves linear or linear-oblanceolate, acutish, 3 cm. or 

 less in length, with 2 lines of large glands beneath and rarely a few 

 irregularly scattered smaller ones ; margins entire or closely serrulate, 

 becoming revolute, bearing from 3 to 6 pairs of remote setae well below 



