286 Annals of the South African Museum. 



Heads acutely acuminate or subacute in 

 bud, narrowly cylindric and widest 

 across the middle when open, 4 5 mm. 

 in diameter. 

 Leaves pubescent within at the base . 54. leptospermoides.. 

 Leaves glabrous within the base . . 55. gymnocline. 

 Heads obtuse in bud, constricted in the 

 middle, about 3 cm. long ; leaves 



2-3 cm. long 5(>. Pillansii. 



Heads obtuse in the bud, obconic and 

 widest across the top when open, about 

 1 cm. broad or slightly more or less. 

 Leaves flat and oblanceolate, 2 -3 - 5 mm. 



broad ...... 57. oblanceolala. 



Leaves more or less terete, 1- 1*5 mm. 

 broad. 

 Leaves 1 cm. long or more ; bracts 



coriaceous, brownish . . .58. pollens. 

 Leaves 8 mm. long or much less; bracts 

 greenish or yellow with mem- 

 branous margins. 

 Bracts not truncate and mucronate. 

 Bracts green all along the middle, 



glabrous .... 59. sordida. 



Bracts keeled in the upper half 



only, minutely ciliolate . 60. ambrariifolia. 



Bracts truncate and mucronate . 61. xmgniculata. 



Section I. INCANAE. 

 1. P. acuta, Muscliler in Engl. Bot. Jahrb. xlvi. 99. 



A shrub; branchlets appressed-woolly -pubescent with white or 

 silvery hairs. Leaves opposite, connate at the base, linear, acute or 

 subobtuse, trigonous in section, 4-10 mm. long, about 1-1*75 mm. 

 across the flat upper surface, thick, woolly-pubescent with silvery 

 hairs. Heads terminal, solitary, campanulate-obconic, 1 cm. long and 

 about the same in diameter, several-flowered. Involucral bracts about 

 6-seriate, bright greenish yellow, the outermost linear-lanceolate, about 

 4 mm. long, the innermost linear-oblong, 8 mm. long, all with narrowly- 

 membranous margins, woolly-villous outside, and acutely cuspidate- 

 acuminate. Receptacle small. Corolla yellow, 6 mm. long ; tube 

 strongly ribbed for 15 mm. at the base, upper part cylindric and 

 slightly contracted to the base of the lobes, glabrous; lobes linear, 

 subacute, 2 mm. long, finely pubescent outside. Achenes obconic, 

 3 mm. long, densely appressed-villous. Pappxis 7 mm. long, straw- 

 coloured. 



