A revision of the genus Pteronia (Compositae) . 295 



15. P. centauroides, DC. Prodr. v. 362. 



Branches fairly slender, subterete, scabrid-papillous. Leaves opposite 

 or subopposite, free from each other at the base, linear or linear- 

 lanceolate, subacutely mucronate, 1-2 cm. long, 1*5-4 mm. broad, 

 coriaceous, with a slightly prominent midrib on the lower surface, 

 scabrid-papillous on both surfaces. Heads terminal, solitary, peduncu- 

 late, cylindric, 2*5—3 cm. long, about 1*3 cm. in diameter, about 

 25-rlowered. Iuvolucral bracts 6-7-seriate ; the outer ovate, about 

 0'5 cm. long; the intermediate oblong, 1'5 cm. long, about 05 cm. 

 broad; the innermost linear, 2 cm. long, about 4 mm. broad; all 

 rounded at the apex and with extremely narrowly membranous 

 margins, scaly, glabrous. Receptacle quite flat, honeycombed, fimbril- 

 late, about 6 mm. in diameter. Corolla-tube 12 cm. long, gradually 

 widened upwards, glabrous; lobes linear-lanceolate, obtuse, 2*5 mm. 

 long, glabrous. Achenes 7 mm. long, compressed, obovate-oblanceolate, 

 villous with long silky appressed hairs. Pappus brownish-yellow when 

 dry, 1-3 cm. long. — Harv. in Harv. & Sond. Fl. Cap. iii. 105. 



Distrib.— Worcester; Dutoit's Kloof, 1UU0-2UC0 ft,, Cctober- 

 January, Drege ! 



16. P. undidata, DC. Prodr. v. 361. 



A shrub ; main branches light coloured, with longitudinally splitting 

 bark ; flowering branchlets slender, minutely viscid-puberulous. 

 Leaves opposite, free from each other at the base, obovate, narrowed 

 into a short petiole, 0*5-1*5 cm. long, about 08 cm. broad, with 

 strongly twisted and crinkled margins, more or less viscid, coriaceous, 

 scabrid on the margins and midrib. Heads 3-6 at the ends of the 

 branchlets, 3-4-flowered, pedunculate, somewhat turbinate, 1*5-2 cm. 

 long; pel uncles 0*5-1*5 cm. long, slender, scabrid-puberulous, with a 

 pair of small oblong opposite bracts at the base of the involucre. 

 Involucral bracts about 3-seriate, gradually longer upwards ; the 

 outermost oblong-lanceolate, subacute, about 2 mm. long ; the inner- 

 most liuear-oblauceolate, obtuse, about 8 mm. long and 2 mm. broad ; 

 all membranous and glabrous. Rece/dacle very small. Corolla gradu- 

 ally widened upwards, 1 cm. long, glabrous ; lobes linear-lanceolate, 

 subacute, 2 - 5 mm. long. Anthers scarcely exserted from the tips of 

 the corolla lobes. Achenes somewhat compressed, abruptly contracted 

 at the apex, 5 mm. long, slightly pubescent and glandular. Pappus 

 1 cm. long, nearly white. — Drege, Zwei Pflanzengeogr. Docum. 90, 95, 

 214 ; Harv. in Harv. & Sond. Fl. Cap. iii. 104. 



Distrib.— Little Namaqualand : Modderfontein, 1500 2000 ft., 



