78 ON SOUTH-AMERICAN APOCYNACEZ. 
MERIZADENIA *. 
This genus is proposed for a few South-American plants uniform in their characters, 
the type of which is the Tabernemontana Sananho of the * Flora Peruviana.’ They are 
tall trees, with an erect trunk, a branching head with large leaves, all yielding an 
abundant milky juice. 
MERIZADENIA, nob.: Calyx parvus. Sepala 5, ovata, erecta, imbricata, singulatim squamula 2-dentata 
intus munita. Corolla anguste infundibuliformis; tubus cylindricus, supra medium paullo ventri- 
cosus, et hinc spiraliter 5-nervosa; segmenta spathulato-oblonga, obtusa, obliqua, tubi fere longi- 
tudine, latere dextro mucronulata et hinc sub estivationem subito introplicata, apicibus faucem fere 
attingentibus, et sinistrorsum convoluta, post expansionem extus omnino deflexa. Stamina in parte 
ventricosa tubi inclusa, subbrevia; filamenta brevissima ` anthere in conum cohsrentes, apice 
acuminate, imo tenuiter 2-furcatz. Discus 5-lobus, lobis erectis, obtusis, discretis. Ovaria 2, acute 
oblonga, libera, disco paullo longiora; stylus simplex, tenuis; clavuncula incrassata, parvula, ad 
antheras agglutinata; stigmata 2, minima, terminalia. Folliculi 2, globosi vel ovati, plus minusve 
retrorsum rostrati, divaricatissimi, sutura ventrali longitudinali dehiscentes. Semina plurima, obo- 
vata, dorso plurisulcata, nuda, ventre canaliculata, in sulci medio hilo notata, et hine funiculo pul- 
poso affixa et ei semiimmersa, funiculis ad placentas suturales utrinque coh:erentibus. 
Arbores Americe meridionalis; truncus crassus, erectus, ramosissimus ; folia opposita, majuscula, 
oblonga, acuta, glabra, breviter petiolata; corymbi ad nodos solitarii, pedunculati, multiflori ; 
pedunculus imo nudus, apice bis trichotome divisus; flores mediocres. 
l. Menizapenta SANANHO, nob.: Tabernemontana Sananho, R. & P. Flor. Per. ii. 22, tab. 144; A. DC. 
Prodr. viii. 363. In Peruvia: non vidi. 
A tree nearly 40 feet high, with a spreading head, an erect trunk, and copious 
branches, all yielding a copious milky juice. It has stoutish terete dichotomous branch- 
lets, with axils 1} in. apart; leaves oblong, boatshaped, acute at the base, and with a long, 
narrow, recurved point, repandly undulated at the margins, with prominent divergent 
nerves and reticulated veins, 5-6 in. long, 2-24 in. broad, on stout subtetragonous petioles 
3-5 lines long, thickened and fossate at the base, where they are conjoined across the 
node by a prominent ridge. A single extra-axillary panicle at the nodes, 10-20-flowered, 
13 in. long, on a stout peduncle 4 lines long, bearing several branchlets 2-3 lines long, 
each supporting 3 flowers on stoutish pedicels 2 lines long, furnished with small, cordate, 
rounded bracteoles; calyx 21 lines long, with 5 rounded sepals; corolla 13 in. long, pale 
yellow, divided halfway into 5 segments; tube cylindrical, angularly striated; segments 
spathulately oblong, gibbously rounded at the summit, with a strong, nearly median 
nerve, suddenly and completely deflexed, 10 lines long, 6 lines broad; stamens smallish, 
biaristate, inserted near the middle of the tube; 2 divaricated follicles subglobose, 
stipitate at the base, with a short recurved apex, smooth, 2 in. long, 14 in. broad, con- 
taining many dark obovate compressed seeds costately striated on the dorsal face, 
6 lines long, half-imbedded in the fleshy funicles. 
* From pepifw (divido), et adhr (glandula), on account of its divided disk. 
