FLORA OF CENTRAL MADAGASCAR. 45 



Butomus iimbellatus, L. — Barton ; Baltonsboro'. 



Leinna trimlca, L., and L. pohjrrJiiza, L. — Baltonsboro'. 



Potamogeton pusiUus, L., var. tenuimimis. — Baltonsboro'.' 



Carex axillaris, Good. — Baltonsboro'. 



Setaria viridis, Beaiiv. — Eiibbish heap, Baltonsboro. Probably 

 a casual. 



Asjdenium Adiantum-nigrum, L. — Scarce, and always much 

 dwarfed. 



Ophioglossum vulgatum, L. — Butleigh. 



CONTKIBUTIONS TO THE FLOEA OF CENTRAL 

 MADAGASCAR. 



By J. G. Baker, F.R.S. 



(Continued from p. 17.) 



Xerochlamys, gen. nov. CJdcenaceariim. 



Involucel a large persistent coriaceous pilose cup with 5 deltoid 

 teeth. Sepals 3, free, obovate, about as long as the involucel. 

 Petals 5, obovate, spathulate, much imbricated in bud, nearly twice 

 as long as the sepals. Stamens indefinite (about 20), monadelphous 

 at the base; filaments rather flattened; anthers minute, subglobose, 

 dorsifixed. Ovary globose, 3-celled, pilose, with several ovules in 

 a cell ; style simple, persistent, elongated, with a large mushroom- 

 shaped stigma. Fruit a capsule about the size of a pea, surrounded 

 by the withered involucel and sepals. Seeds about 3 in a cell, 

 hairy, angular. Allied to Leptolmna, Thouars, from which it dift'ers 

 by its dry involucel, indefinite stamens, and ovary with more than 

 2 ovules in a cell. 



Xerochlamys pilosa. Baker. — A small prostrate much-branched 

 shrub, with slender pilose terete flexuose ultimate branchlets. 

 Leaves alternate ; petiole very short ; stipules minute, deciduous ; 

 blade oblong, entire, -l—f in. long, obtuse, rounded at the base, 

 green and thinly pilose above, densely coated with bright brown 

 hairs beneath, the veining quite hidden. Flowers solitary, terminal, 

 subsessile. Involucel campanulate, \ in. diam., coated with brown 

 hairs like the under side of the leaves, the teeth much shorter than 

 the entu-e part of the cup. Sepals obovate, sickly on the outside. 

 Petals obovate-spathulate, rose-red, f in. long, ^ in. broad. Ovary 

 densely ^Dilose, finally a little longer than the involucel, which it 

 splits down the side as it ripens ; style glabrous in the upper half, 

 as long as the ovary, persistent. — On the top of a blerk stony hill 

 in the west of the Betsileo-country, Baron 134 ! 



Pavonia Bojeri, sp. n. — Urena? hispida, Bojer MSS. — An erect 

 perennial, several feet high, with slender terete densely hispid 

 branchlets. Leaves with long petioles, the blade 2-3 in. long and 

 broad, deeply cordate at the base, shallowly palmately 3-lobed, the 

 lobes deeply irregularly dentate, both surfaces densely persistently 

 hispid. Flowers on very short peduncles, solitary in the axils of 



