66 PROCEEDINGS OF THE AMERICAN ACADEMY. 
about the akene: receptacle naked: ray-flowers fertile, the rays yellow, 7 
rarely purple or white ; disk-flowers perfect, the corolla 5-lobed, more ot 
less bilabiate: style hispidulous, the short branches obtuse and without — 
appendages: pappus of a few or many pales or awns or bristles, of | 
reduced to squamelle or to an auriculiform crown, or rarely wanting: — 
akenes linear, terete or somewhat angled, generally pubescent, becoming — 
glabrate. — Syst. Nat. ed. 10, 1221, Amecen. Acad. v. 407 & Gen. ed. 6 
no. 963; Poir. Dict. v. 119; HBK. Nov. Gen. & Spec. iv. 261; Cass 
in Dict. Sci. Nat. xxxviii. 202; Less. Linnea, vi. 708; DC. Prodr.¥ 
98; Gray, Pl. Fendl. 61, Pl. Wright. i. 82, & Proc. Am. Acad. xix. 49) 
Benth. & Hook. f. Gen. ii. 412; Hemsley, Biol. Centr.-Am. Bot. ii. 2244 
Baker in Mart. FI. Bras. vi. pt. 38, 285; Engl. & Prantl, Nat. Pflanzf. 
iv. Ab. 5, 266. Seala, Adans. Fam. ii. 131. Lorentea, Lag. Gen. & 
Spec. Nov. 28; Less. Linnea, v. 135; DC. Prodr. v.101. Stammarium, 
Willd. in Less. 1. c. in syn.; DC. Prodr. v. 102, as section. Oryp! 
petalon, Cass. Bull. Soc. Philom. jan. 1817 & Dict. Sci. Nat. xii. 123. 
Chthonia, Cass. Bull. Soc. Philom. (1817) 33 & Dict.. Sci. Nat. ix. 17 
Pectidium, Less. Linnea, vi. 706; DC. Prodr. v. 98. Helioreos, Raf 
Atl. Jour. (1832) 145. Pectidopsis, DC. Prodr. v. 98; Torr. & Gr. 
ii. 62. Cryptopetalum, DC. 1.¢. 101,in syn. Cheilodiscus, Triana, And. 
Sci. Nat. ser. 4, ix. 36. 
§ 1. Euprctis, Gray. Pappus (at least of disk) of comparatively 
large pales with or without terminal awns, or in one section with 
pales often splitting away from the bases of the awns: involucre bi sie 
10 bracts. — Pl. Wright. i. 83 & Proc. Amer. Acad. xix. 44, 0 et 
Seala, Adans. Fam, ii. 181. Lorentea, Lag. Gen. et Sp. Nov. 285 Gna 
Pl. Wright. i. 83, in part. Chthonia, Cassini, Bull. Soc. Philom. (sh 
33, & Dict. Sci. Nat. ix. 178. Peetis, Less. Linnea, vi. 708, in pare 
DC. Prodr. v. 98, in part. 4 
* Pales few (4 to 6 in disk, 2 or 3 in ray). 
+ Pales all attenuate or prolonged into awns or subulate tips. 2 
++ Erect or diffuse, involucre 4-6 (usually 5)-bracteate : awns of the pappus ™" : 
permanent paleaceous bases. 4 
Pai P. ciliaris, L. Slender, erect and sparingly branched or site 
to 4 dm. high, the somewhat tetragonous stems smooth or sparingly es ) 
berulent above: leaves linear or linear-oblanceolate, acutish, 3 ee 
less in length, with 2 lines of large glands beneath and rarely 4 d 
irregularly scattered smaller ones; margins entire or closely ou 
ey _ becoming revolute, bearing from 8 to 6 pairs of remote sete well 
