TEOPICAL AMERICAN RUBTACE.1; 253 



A fine shrub, according to the collectors, with yellow flowers, allied 

 io P. invohicellaris Miill. Arg., from which it is readily separable by 

 the relative length of calyx and corolla, and the much smaller corolla 

 and relatively smaller involueels. Leaves 4-8 x 2-3 cm., with stalk 

 rarely more than 7 mm. long ; stipular sheath barely 3 mm. deep. 

 Involucel 2-3 mm., exserted part of calyx 6-7 mm., of corolla 

 (including the more or less erect lobes) — about 1 cm., of which the 

 lobes occupy nearly 6 mm. Corolla 3 mm. broad at base of lobes, 

 which are barely 2 mm. broad. The caU'x grows considerably after 

 ilowering, the lobes elongating. 



Psychotria (§ Mapouria) articulicymosa, sp. no v. Frutex gla- 

 berrimus, ramulis gracilibus novellis complanatis striatis demum 

 subteretibus. Folia papyracea rhomboidea v. elliptica acuminata 

 basi cuneata apice subacuta, venis secundariis utrinque 6, breviter 

 petiolata ; stiindoB subcoriaceaj ovatse, apice obtusae demum plus 

 minus pectinatse. Flares in cymularum longiuscule pedunculatarum 

 paniculis laxe dispositi arete sessiles, hracteis exiguis, pedunculo com- 

 muni longiusculo. Calyx campanulatus obscuriuscule late lolatus, 

 ovarium consj^icue sulcatum colore fuscum coronans ; corollcB tubus 

 calj'^cem vix excedens 6-mene cylindricus, limbo patente, lobis anguste 

 lanceolatis subaoutis, 



Colombia : Bogota, Anapoirna, over 2000 ft., Triana 1692 ! 



This sj^ecies is related to Mapouria sclerocalyx Miill. Arg., native 

 about the Rio Negro, Brazil ; but the leaves of our species are much 

 thinner in texture, the stipules more or less persistent — at least the 

 lower part, as a sort of rigid, very short sheath — and the corolla-tube 

 is very much shorter, relatively, than in M. sclerocalyx, scarcely 

 exceeding the calyx. The leaves are from 9 cm. to 14 cm. long, and 

 from 3-5 cm. to nearly 6 cm. wide ; petioles not exceeding 5 mm. 

 in length ; stipules, about 7 mm. X 4*5 mm. Peduncle (principal, 

 terminating ordinary branches) 3 cm, to 7 cm., or longer. In- 

 Jlorescence about 5 cm. long, and 4'5 cm. across ; longest peduncles 

 of the small c^^mes, about 2 cm. Calyx, above ovar}^ barely 2 mm. ; 

 (sulcate) ovarj, about 1 cm. long. CoroUa-tnhe, about 2-5 mm. 

 long ; lobes 3 mm. or longer. 



Psychotria (§Mapom'ia) familiarifolia, sp. nov. Frutex nitens, 

 ramulis quadrangularibus laevibus striatis cortice argenteo-griseo mox 

 indutis. Folia glaberrima coriacea lanceolata basi in petiolum breveni 

 validiusculum leniter angustata apice subacuta acuminata, venis 

 secundariis subtus prominulis utrinque ca. 14 ; stipulcB oblongas 

 obtusissimse caduca^. Flores parvi in cyma umbellata trichotoma 

 laxiuscule dispositi, hracteis parvis ovato-oblongis truncatis intus 

 pilosiusculis necnon subconcaveis. Calyx obtuse sulcatus necnon 

 lobatus subcoriaceus ; corolla extus glabra insuper infvmdibularis, 

 limbo demum reflexo lobis lanc^olato-triangularibus obtusis. 



Colombia : Triana 134 ! 



Related to Mapouria corymhifera Miill. Arg., from which it 

 differs chiefly in the texture, shape, and venation of the leaves, 

 which recall those of M. nicaraguensis Benth. Thej^ measure about 

 8-12 cm. X 2*5-4 cm., with stalk not exceeding 1-2 cm. : stipules 

 S mm. X 3 mm. The three primary cj^me-branches are 2'5-3*5 can. 



