FLORA OF MADAGASCAR. 171 
sometimes 1-2 ft. long. Leaves shortly petioled, ovate, acute, 
4-4 in. long, cuneate at the base, green and glabrous on both 
surfaces. Stipules each with about three setaceous cusps. 
Flowers 1-2, sessile in the axil of the whorl of leaves that termi- 
nates the branches. Calyx lin. long in the flowering-stage, with 
a small oblong tube, 3-4 minute teeth and 1-2 large leafy ones. 
Corolla-tube very slender, 1 in. long. Stamens 5, inserted at the 
throat of the corolla-tube; filaments filiform ; anthers linear- 
oblong. Fruit oblong, densely pilose, crowned by the persistent 
unequal ealyx-segments.— Central Madagascar, in dry soil in the 
province of Imerina, Lyall 305! Parker! Baron 414! 1118! 1009! 
a dwarf densely-tufted variety with leaves never above 1 in. long. 
Well marked from the only other species, O. scabra, Zucc., by 
the inflorescence and the shape of the leaves. 
ANTHOSPERMUM POLYACANTHUM, n. sp. 
Herbaceum, perenne, glabrum, dense cæspitosum, foliis sessilibus verti- 
cillatis lanceolatis aculeis retrorsis marginatis, floribus minutis sessilibus 
terminalibus, masculo ovario rudimentario bilobo limbo calycino nullo, 
corolle infundibularis segmentis oblongis quam tubus longioribus, sta- 
minibus segmentis zquilongis, filamentis elongatis, antheris minutis ob- 
longis, stylo profunde bifido. 
A perennial herb with the habit of a Galium, with densely 
tufted erect sharply 4-angled stems, glabrous in all its parts. 
Leaves 4-5 in a whorl, sessile, lanceolate, spreading, 4 in. long, 
firm in texture, turning blackish when dried, margined by 5-6 
strong hooked stramineous prickles on each side. Flowers sessile 
in the axil of the upper whorl of the leaves. Ovary in the sta- 
minate flower minute, 2-lobed, emarginate, without any distinct 
ealyx-limb. Corolla 2 in. long, with a short funnel-shaped tube 
and 4 oblong ascending segments twice as long as the tube and 
hispid at the tip outside. Stamens as long as the corolla-seg- 
ments ; filament long, slender; anthers minute, oblong.— Central 
Madagascar, Baron 1849 ! 
ANTHOSPERMUM THYMOIDES, n. Sp. 
Herbaceum, perenne, dense caspitosum, caulibus gracillimis puberulis, 
stipulis deltoideis, foliis sessilibus verticillatis oblanceolatis, floribus mo- 
noicis ad axillas foliorum sessilibus, ovario bilobo, limbo calycino subnullo, 
staminiferis corollæ tubo infundibulari, segmentis lanceolatis tubo æqui- 
longis, staminibus segmentis aquilongis. 
A. densely tufted perennial herb, with very slender ascending 
