Pteronia.] COMPOSITE (Hary.) 105 
28, P. leucoclada (Turez.!); much branched, the twigs rigid, divari- 
cate, glabrous, white-barked ; leaves alternate (small), linear-oblong or 
linear, obtuse, thick, nerveless, sub-sessile, glabrous and glaucous; heads 
terminal, solitary, sessile, several-flowered ; iny.-scales loosely imbricated 
in many rows, ovato-lanceolate, much acuminate, the innermost taper- 
ing into a long, awnlike point, all with a broad, membranous, entire 
margin ; achenes densely silky. 
Has. Bitterfontyn, Zeyher! 811. (Herb. Sond., D.) 
A rigid shrub, 1-2 f. high, with brachiate branches and twigs, and remarkably 
white, smooth bark, Leaves scattered, subdistant, 2-4 lines long, scarcely 1 line 
wide, sometimes fascicled. Heads 4-5 lines long, 3 lines diam., pale. A remark- 
able species’; apparently very nearly related to P. acuminata. 
29. P. Candollei (Harv.) ; “ quite glabrous, leaves opposite, oblong- 
linear, thickish, with a prominent midrib beneath, glaucous, crowded 
about the apices and in the axils; heads terminal, solitary, sessile, 
4-flowered ; scales of the glabrous invol. oval-oblong, with a wide, 
membranous margin, acuminate-submucronate.” DC. P.glabrata, DC. 
l. c. 362, non Linn. f. 
Has. Karroo River, Burchell, Cat. 1410. (fide DC.) 
Unknown to us. P. glabrata, L. f. (by Herb. Thunb.!) is P. sesuviifolia, DC.! 
30. P. acuminata (DC. 1. c. 361); “glabrous; leaves alternate, lan- 
ceolate, tapering to each end, mucronate, nearly nerveless ; heads ter- 
minal, subsessile, oblong, 10-12-fl.; invol. scales lanceolate, acuminate, 
scarious at the margins.” DC. 
Has. Beyond the Gariep, Burchell, 1587 (fide DC.) 
** Leaves 10~12 lines long, 3 lines wide. Achenes compressed, very villous, 
attenuated under the reddish pappus.” DC. 
31. P. centauroides (DC. 1. c. 362); branches and adult leaves 
glanduloso-pulverulent, scaberulous, twigs and young foliage glanduloso- 
velutinous and canescent; leaves opposite and alternate, sessile, entire, 
acute, the cauline oval-oblong or lanceolate, midribbed, those of the 
twigs linear; heads terminal, solitary, oval, many-flowered ; invol. scales 
appressed, entire, very obtuse, glabrous, with a very narrow membranous 
edge, the outermost short, canescent at base. : 
Has. Dutoitskloof, Drege! (Herb. Hk., Sd.) : 
Apparently a shrub, 2-3 feet high, with erect, ramulous branches. Cauline leaves 
7~12 lines long, 2~3 lines wide; rameal 5-6 lines long, scarcely a line wide. Heads 
an inch or more long, 6-8 lines in diameter. 
32. P. villosa (Linn. f. Suppl. 356); twigs scabrous and pilose ; 
leaves mostly alternate, linear, obtuse, flat, thick, nerveless, on both 
sides rigidly pilose with swollen, jointed hairs; heads terminal, solitary, 
sessile, many-fl., ovato-globose ; invol. scales appressed, glabrous, broadly 
oblong, very obtuse, membrane-edged, the inner equalling the dise, 
scarious and undulate at apex; achenes densely hairy, with a short, 
thick neck. Thunb. / Cap. p. 631. 
Has. Hantum and Carroo below Bockland, Thunberg’ (Herb. Thunb.) 
A scrubby, fiexuous bush, a foot or so in height. Pubescence very coarse and 
rough. Leaves }-1 inch long, 1 line wide, by Thunberg said to be ‘‘ opposite,” but 
