96 COMPOSIT (Harv.) 
( Artificial Analysis of the Species ). 
[ Pteronia. 
A. Heads 3 or more, in tufts or corymbs at the ends of the branches : 
(a) Leaves alternate, linear-subulate : 
Heads few-flowered, subsessile ; achenes hairy... 
Heads many-fl., ending leafy branches ; achenes 
glabrous... : 
(b) Leaves opposite, sheathing at base, linear or subulate : 
Heads 1-3, many-flowered ; lvs. filiform . 
Heads 3, sessile, 3—5-f1.; vs. short ... 
Heads corymbose, pedicelled, 3—5-fi.; lvs. filiform 
Heads densely fascicled, sessile, 1-f1.; ‘Ivs. subulate 
(c) Leaves opposite or ternate, not sheathing at base : 
Leaves linear-trigonous, glabrous : 
Leaves in threes, hook-pointed ; heads co- 
rymbose 
Leaves opposite, ‘obtuse ; heads 1 1-3, pedi 
cellate, clammy 
Leaves opposite, hook-pointed ; “heads in 
, Sessile .., Sus 
Leaves linear-oblong, flat, nerved, powdery 
Leaves broadly ovate or oblong, sub- — 
Leaves flat, pale, powdery .. = 
Leaves wavy and curled, glandular he 
B. Heads solitary at the ends of the branches, 
(3) baecharoides, 8. 
(51) camphorata. 
(20) flexicaulis, 
(21) paniculata, B. 
(21) paniculata, 
(22) fasciculata. 
(4) uncinata, 
(13) pallens. 
(14) tricephala. 
(39) quinquefiora. 
(5) divaricata. 
(24) undulata. 
1. Inv. sc. close- -pressed, often viscid, mostly broad, blunt, bluntish or mucronate. 
(a) Leaves alternate (at least the upper ones). 
Glabrous ; leaves smooth. ; achenes hairy 
Glabrous ; lvs. rigidly ciliate ; achenes glabrous 
Hispid and scabrous ; lvs. linear; _ achenes hairy 
Pulverulent ; achenes 
Tny. scales membr.-edged, pet lvs. acute 
Inv. scales not bordered, straw-colour ; lvs. 
DING... oss 7 re 
(b) Leaves opposite, not glabrous. 
Softly-tomentose or canescent : 
Lys. lin.-oblong, 1-2 lines wide, 4-5 1. long 
Lys. elliptic-oblong, nerved, 3-5 lines — 
8-10 lines long... . se 
Pulverulent-scabrous or ‘glandular : 
Inv. scales round-topped, membr.-edged ; 
lvys. acute, faintly nerved... . 
Inv. scales ovate, subacute, ‘not “bordered ; 
lys. acute, midribbed __.... 
Tnv. scales straw-colour, obtuse ; ‘Ivs. blunt, 
nerveless ... : 
Rigidly pubescent or hispid : 
Leaves ciliate, linear-lanceolate ; fl. purple 
Leaves oval or oblong-lanceolate ; fl. yellow 
(c) Leaves opposite, glabrous (sometimes ciliate) : 
Leaves oval or round; inv. scales with a white 
border __... 
Lvs. (small) oblong-linear or oblong, nerved : 
Heads 4-flowered ; iny. scales with a —— 
membr. border... ... 
Heads several-fl. ; inv. scales. rigid, opaque : 
Achenes densely hairy : 
Leaves sub-connate; inv. scales 
aoe aoe 
Achenes sel Ae Bt inv.scls. viscid 
(16) gymnocline. 
(49) onobromoides. 
(32) villosa. 
(31) centauroides, 
(10) lucilioides. 
(9) cinerea. 
(25) ovalifolia. 
(31) centauroides, 
(7) oppositifolia. 
(10) lucilioides. 
op i 
(36) leucoloma. 
(29) Candollei. 
(12) glomerata. 
(17) ciliata. 
(45) viscosa, 
