FLORA OF MADAGASCAR. 215 
not more than 3-4 inches long. Leaves in opposite pairs, ovate, 
ascending, crenate, not more than j in. long, pilose beneath. 
Flowers solitary, from the axils of the leaves all down the stem, 
on slender ascending pedicels, the lower 1-1} in. long, the upper 
growing gradually shorter.  Flower-calyx j in. long, with an 
oblong tube with 10 pilose ribs and 5 small deltoid teeth. Corolla 
twice as long as the calyx, shortly pilose, with lobes } in. long. 
Stamens just reaching to the throat of the corolla-tube; anthers 
2-celled, oblong, caudate, densely hairy on the back. Fruit 
globose, J in. in diam., black, glabrous, splitting the persistent 
calyx. Seeds very numerous, angled, clavate, pale brown, glabrous, 
15 in. long.— Central Madagascar, Baron 1847! 
TETRASPIDIUM, genus novum Scrophulariacearum tribus 
Gerardiearum. (Tab. XXV.) 
Calyx brevis, pilosus, tubo campanulato, dentibus 5 lanceolato-deltoideis 
quam tubus duplo brevioribus. Corolla tubo curvato infundibulari, seg- 
mentis 5 parvis orbicularibus, posticis estivatione interioribus. Stamina 
4, didynama, prope basin corollze inserta, in tubo inclusa, filamentis filifor- 
mibus, antheris pendulis orbicularibus peltatis basifixis ; antherarum loculus 
alter perfectus orbicularis mutieus, alter abortivus vel minimus. Ovarium 
sessile, ampulla forme, 2-loculare, ovulis in loculo pluribus ; stylus elon- 
gatus filiformis, stigmate integro clavato. Fructus ignotus.— Herba para- 
sitica Madagascariensis siccitate nigrescens, foliis pluribus parvis sessilibus 
lanceolatis, inferioribus oppositis, superioribus alternis, floribus multis 
laxe racemosis purpurascentibus foliis reductis bracteatis. 
T. nAxIFLORUM, Baker. (Plate XXV. figs. 1-5.) 
A parasitic herb, turning entirely black in drying, with simple 
erect finely pilose stems 2-3 fect long (inflorescence included). 
Leaves numerous, sessile, lanceolate, entire, adpressed to the 
stem, 1-14 in. long, 1-nerved, slightly pilose, the lower in decus- 
sate pairs, the upper alternate. Flowers in very lax racemes 
6-9 in. long; pedicels sbort, ascending, with a reduced lanceolate 
leaf at the base. Calyx } in. long and broad. Corolla 3 in. long, 
pilose externally, turning black like the rest of the plant, the 
segments from one third to one fourth the length of the tube. 
Stamens all four inserted near the base of the corolla; filaments 
scabrous, rather flattened towards the base; anthers basifixed, 
pendulous, orbicular, 3 line long, the second cell entirely absent 
orvery small and rudimentary. Ovary ampulleform; style fili- 
form, } in. long, decurved at the clavate stigmatose tip.— Central 
Madagascar, Baron 1855! Allied to Alectra and Harveya, from 
