418 ME. J. G. BAKEB ON THE 



small, sessile, aggregated in globose terminal clusters |-f in. in 

 diam. Involucre £ in. long, villose at the base, composed of a 

 few rows of pure white rigid erect bracts of moderately firm tex- 

 ture. Pappus of white bristles. — Baron 2611 ! 



Helichbysum xtlocladum, n. sp. 



Fruticosum, ramulis lignosis albido-tomentosis, foliis parvis oblongis 

 obtusis coriaceis integris sessilibus facie tenuiter dorso dense albido- 

 tomentosis, capitulis 6-7-floris in paniculam amplam latam ramulis divari- 

 catis dispositis, involucro magno obconico multiseriali albido-tomentoso, 

 bracteis apice scarioso patulo orbiculari praeditis, pappo albido. 



A shrub, with straight woody branchlets clothed with per- 

 sistent whitish tomentum. Leaves under an inch long, obtuse, 

 cuneate at the base, very thick and rigid in texture, clothed 

 thinly above and more densely beneath with whitish persistent 

 tomentum like that of the stem. Capitula very numerous, 

 arranged in a panicle 6-8 in. long and broad, with divaricated 

 corymbose branches. Involucre |— ^ in. long, tomentose in the 

 lower part ; all the bracts rigid downwards, furnished with a 

 spreading chartaceous white orbicular tip, the outer ones gra- 

 dually shorter. Eeceptacle flat, very small. Pappus of white 

 ciliated bristles.— Baron 3268 ! 3321 ! 



Melantheba hadagascaeiensis, n. sp. 



Herbacea, sarrnentosa, ramulis gracilibus hispidis, foliis petiolatis lan- 

 ceolatis membranaceis utrinque hispidulis, capitulis radiatis laxe corym- 

 bosis, pedunculis pedicellisque erectis elongatis, involucro brevi campanu- 

 lato bracteis subaequilongis lanceolatis, ligulis fcemineis, achamio obconico 

 angulato apice truncato setis pluribus fragilibus coronato. 



A sarmentose perennial herb, with slender angled slightly 

 hispid stems. Leaves opposite, 3-4 in. long, obscurely dentate, 

 cordate or truncate at the base, green and scabrous above, pale 

 green and more hispid beneath ; petiole |-| in. long. Heads 

 arranged in a very lax corymb on long slender erect peduncles 

 and pedicels. Unexpanded heads globose, g in. in diam., with 

 the rigid ovate-lanceolate paleae of the receptacle exceeding the 

 young corollas. Involucre broadly campanulate, g in. in diam., 

 ^ in. long ; bracts lanceolate, subequal, almost foliaceous, very 

 hispid. Ligules 15-20, bright yellow, 3 in. long, with a perfect 

 style but no stamens. Achene angled, truncate at the apex, 

 T^ in. long; bristles 6-10, fragile, caducous, as long as the 

 achene.— Baron 2314 ! 2534 ! Humllot 410 ! A new genus for 

 the island. Three species are known in Tropical Africa. 



