86 ON SOUTH-AMERICAN APOCYNACEA, 
This plant bears much resemblance to a Vallesia, to which genus Riedel referred 
G. Fellosii. It is a tree with a smooth bark; the axils of its slender branchlets are 
about i in. apart, except the three terminal ones, which are barely 1 line distant; the 
leaflets there are about 9 lines long; the leaves of the main branchlets are 2—2+ in. long, 
14-14 in. broad, upon slender petioles 7 lines long; the peduncle of the corymb is 4 lines 
long, its 3—4 branches 4 lines long, their 2 secondary branches 14 line long, each bearing 
2 small flowers on pedicels 4 line long; the sepals 4 line long; the tube of the corolla 
1i line long; the segments 2 line long; the stamens, upon very short filaments, are 
enclosed within the mouth of the tube. 
These characters all conform with Geissospermum, rather than with Vallesia; its only 
peculiarity is the more diminutive size of its flowers. 
A drawing of this species, and an analysis of its flower, are seen in Plate XIT. a. 
The Wheeleria oppositifolia, Sol., is described under Thyrsanthus velutinus, nob. 
6. GetssosPERMUM sERICEUM, Benth. & Hook. Gen. ii. 707: Thyrsanthus sericeus, Sagot, MS.: ramis 
subvalidis, dichotomis, ramulis tenuibus: foliis alternis, ellipticis, imo acutis, apice in acumen 
longiusculum subito constrictis, chartaceis, margine undulatis, supra lete viridibus, opacis, obsolete 
pilosis, costa prominente, nervis prominulis, venis reticulatis, subtus fulvide opacis, costa nervisque 
sublanatis ; petiolo tenui, sulcato, obsolete puberulo, limbo 9plo breviore: racemis axillaribus, con- 
gestifloris, quam folium triplo brevioribus; floribus parvis, ochraceo-pubescentibus ; corolla parva ; 
segmentis angustis dextrorsum convolutis. In Guiana: v. s. in herb. Mus. Brit. loc. cit. (Sagot 966). 
Its branches are 1-2 lines thick, the branchlets more slender, with axils 2-1 in. apart, 
with a transverse line across the nodes; leaves 3 in. long, 1i in. broad, on a petiole 
4 lines long; panicles axillary, 2-1 in. long, on a stout peduncle 3 lines long, with 
numerous approximate flowers, all covered with yellow tomentum; pedicels 1 line 
long; sepals 2 lines long, linear oblong, obtuse; segments of corolla linear, glabrous, 
3 lines long. 
MALOUETIA. 
This genus was established in 1844 by Prof. De Candolle, who placed it in his tribe 
TABERNJEMONTANELE, from which it was separated by Dr. Müller. It has many species, 
forming trees or erect shrubs, with opposite entire leaves, the nodes generally much 
dilated by a thick transverse sheath, on which the petioles are inserted; the leaves 
generally oblong and acute at both ends, or lanceolate, have ascending nerves, which are 
often furnished below, at the angle of each nerve, with a poriferous gland. 
MazLouEtIa, A. DC.: Sepala 5, parva, acuta, erecta, singula squamula acuta intus munita.  Corolle 
tubus cylindricus, 5-nervis, siepe spiraliter tortus, medio paullo ventricosus, fauce constrictus, et ibi 
sepius squamulis 5 preditus; segmenta 5, oblonga, subacuta, simpliciter dextrorsum convoluta. 
Stamina subinclusa, apice sepius paullo exserta; filamenta ad constrictionem tubi inserta; anthere 
lineares, acuminate, in conum coherentes, imo furcis 2 brevibus acutis armate. Discus e lobis 5 dis- 
cretis erectis subacutis; ovaria 2, eo paullo longiora, oblonga; stylus tenuis stamina attingens; 
clavuncula incrassata cylindrica, imo membrana peltata donata ; stigmata 2, brevissime linearia, ter- 
minalia. Folliculi 2, teretes, ssepius divaricati, glabri, aut rarius pilosi, suleo ventrali dehiscentes, 
suturz marginibus introflexis in placentam cylindricam coalitis. Semina lineari-oblonga, valde com- 
