54 ON SOUTH-AMERICAN APOCYNACEJE. 
Tabernemontana with 3 species :—1, 7. citrifolia, with lanceolate leaves, in Hort. Cliff. 
with a synonym of Plumier's plant; 2, T. laurifolia of Sloane; 3, T. alternifolia, a 
doubtful species of Rheede, Hort. Malab. After this Zabernemontana became the 
receptacle for a host of heterogeneous species; so that in 1844, Prof. De Candolle 
enumerated more than 90, after separating four under two new genera, Peschiera and 
Bonafousia. Subsequently Prof. Müller removed these into Tabernemontana, adding 
nearly 40 new heterogeneous species. I have separated and classified most of these 130 
species, retaining under Zabermemontana only those corresponding to the characters of 
the Linnean type, which I carefully examined; these are easily recognized by their 
hypocrateriform corolla, with sinistrorse «estivation, free slender stamens of a bluish 
tinge, seated above the middle of the tube, their summits being more or less exserted. 
The following may be considered to be the characters of the genus as here restricted. 
T'ABERN.EMONTANA, Plum., Linn.: Sepala parva, oblonga, obtusa aut acuta, quincuncialiter imbricata, 
sæpe membranacea, 2 exteriora interdum latiora, squamula basali lata 2-4-lacinulata intus munita. 
Corolla hypocrateriformis; tubus cylindricus; segmenta 5, tubo paullo breviora, imo unguiculata, 
mox inzqualiter dilatata, szpius dolabriformia, expansa, «eestivatione simpliciter sinistrorsum con- 
voluta. Stamina 5, gracilia; filamenta brevia, supra medium tubi inserta; anthere fere semper 
ceerulescentes, imo longiuscule biaristatze, apice cuspidate et hine plus minusve exserte. Discus 
valde membranaceus, sub-5-lobus, ovariis multo brevior, et iis subadheerens. Ovaria 2, oblonga, 
mutuo applicita. Stylus tenuis, sepe imo breviter fissus; clavuncula incrassata, oblonga, 5-sul- 
cata, imo appendice submembranacea munita; stigmata 2, brevissima. Folliculi 2, valde divaricati, 
oblongo-ovales, gibbosi, stipitati, apice retrorsum rostrati, rima ventrali dehiscentes; semina plurima, 
ovata, dorso striata, ventre concava, hilo mediano affixa, singula funiculis singulis pulposis semi- 
immersa, quomodo ad placentas suturales seorsum affixa. 
Arbores vel suffrutices Americe intertropice vel in Antillis vigentes, ramis sepe dichotome divisis ; 
folia opposita, oblonga, acuta, petiolata; cymæ axillares aut terminales, sepe gemine ; flores albi 
vel lutei. 
1. TABERNZMONTANA CITRIFOLIA, Plum. Gen. (1703) p. 18, tab. 30; Pl. Amer. (1737) ii. 246, tab. 248 B 
(excl. syn.) ; Icon. archetyp. Plum. ined. in Bibl. Banks. tab. 31; Linn. Sp. Pl. (1753) (excl. syn.) ; 
A. DC. Prodr. vii. p. 363; Lunan, Jam. ii. 222; Griseb. Fl. B. W. Ind. p. 409: Tabernemontana 
frutescens, Sloane, Jam. p. 182. In Antilles: v. s. in herb. Mus. Brit. Jamaica (Van Rohr). 
A small tree, 15 feet high, with stout branchlets, having axils 2-3 in. apart, all lac- 
tescent; leaves rather large, oblong elliptic, cuneate or subacute at the base, somewhat ` 
acute at the apex, sides often folded together, margins undulated, bright green above, 
with about 12 pairs of immersed reddish nerves, yellowish opake beneath, with prominu- ` 
lent midrib and nerves, 3-61 in. long, 2-23 in. broad, on broadly channelled petioles | 
with membranaceous margins, 3-6 lines long; panicles lateral, often opposite, with ` 
4 branches, each bearing 2 flowers on short pedicels; sepals small, acute; corolla | 
hypocrateriform, tube 8 lines long; segments a little shorter, linear oblong, oblique; 1 
sinistrorsely convoluted ; stamens inserted below the mouth of the tube; anthers linear, d 
cærulescent, half-exserted, 14 line long, biaristate at the base; disk shorter than the 
2 acute oblong ovaries; style, clavuncle, and stigmata as in the generic character; 2 fol- | 
licles on a peduncle 1 in. long, oblong, acute, costate, horizontally spreading, 2} in. long, ; 
