Selbyana 12: 134-140 1991] TAYI NEW , COMBINATIONS, AND RECORDS IN FROM THE LA SELVA BIOLOGICAL STATION, COSTA RICA CHARLOTTE M. TAYLORS BARRY E. HAMMEL Missouri Botanical Garden, P.O. Box 299, St. Louis, Missouri 63166-0299 WILLIAM C. BURGER Department of , Field Museum of Natural History, Chicago, Illinois 60605

ABSTRACT. The new species Coussarea nigrescens C. M. Taylor & Hammel, Coussarea psychotrioides C. M. Taylor & Hammel, and Hillia grayumii C. M. Taylor are described. The new combinations Chione sylvicola (Standley) W. Burger, Coussarea hondensis (Standley) C. M. Taylor & W. Burger, Psychotria camponutans (Dwyer & Hayden) Hammel, Psychotria elata (Swartz) Hammel, and Psychotria guapilensis (Standley) Hammel are made. The species Borojoa panamensis Dwyer, Faramea parvibractea Steyermark, and Lasianthus panamensis (Dwyer) Robbrecht are reported from Costa Rica for the first time.

The La Selva Biological Station is situated in near the junction of the Rios Puerto Viejo and wet forest in the Caribbean lowlands of north- Sarapiqui, 100m, 5 Nov 1980,5. Hammel 10383 eastern Costa Rica (Frankie et al., 1974; Hammel (DUKE!, holotype). & Grayum, 1982; Wilbur, 1986). The following Puberulent to 7 m tall, drying hlack. new species descriptions and nomenclatural Leaves decussate; blades elliptic, 8-20.5 cm long, combinations result from the study of the Ru- 3.5-9 cm wide, acute to slightly acuminate at biaceae for the Vascular Flora of the La Selva apex, cuneate at base, thinly chartaceous; sec- Biological Station (Wilbur, 1986), and the con- ondary veins 9-11 pairs, without domatia; pet- current study of this in Costa Rica for the ioles 10-35 mm long; stipules interpetiolarly and Flora Costaricensis and the Manual Flora of Cos- intrapetiolarly connate, persistent, triangular, 1.5- ta Rica. Keys, descriptions, and illustrations of 2 mm long, shallowly bilobed. Inflorescences ter- the stipules for all species of Rubiaceae found at minal, corymbiform to pyramidal, 1-2 cm long the La Selva Station will be presented in the and wide; peduncles ca. 2 cm long; bracts tri- Vascular Flora. Several other new species of Ru- angular to ovate, 1-3 cm long, caducous; flowers biaceae known from the La Selva Biological Sta- sessile in glomerules of 3-7, bisexual, 5-merous, tion will be described by Dwyer and Lorence in calyx minutely puberulent, the limb 0.5 mm long, the Flora Mesoamericana. broadly and shallowly lobed; corolla salverform, white, glabrous, the tube 22-24 mm long, the FIGURE 1. A, Coussarea ni; New Species lobes lingulate, 6-8 mm long. Fruit globose to ellipsoid, ca. 1 cm in diameter, black; pyrenes Coussarea nigrescens C. M. Taylor & Hammel, 1-2, globose to ellipsoid or planoconvex, PHENOLOGY. Collected in fl sp. nov. FIGURE 1. smooth. and September to November Arbor ad 7 m alta, puberula, exsiccata nigra. ADDITIONAL SPECIMENS EXAMINED. Costa Rica. HERE- in February. Folia petiolata oppositaque; laminis ellipticis 8- DIA: Canton de Sarapiqui, 2 km S of Magsaysay Penal Colony, N. Garwood et al. 1129 (CR). LIMON: Canton HABITAT AND DISTRIBUTION. 14 x 3.5-6 cm; stipulis persistentibus, truncatis de Limon, Cerro Muchilla, Fila Matona, 9°46'50"N and moist forest at 20-850 rr ad parum bilobatis 1.5-2 mm longis. Inflores- 83°05'30"W, R. Robles & A. Chacon 2667 (CR). and the Osa Peninsula of Co: centia rotundata usque pyramidalis 1-2 x 1-2 PUNTARENAS: Canton de Osa, Reserva Forestal Golfo cm, pedunculo ca. 2 cm longo, flores sessilis Dulce, Rio Tigre, 8°31'40"N 83°26'30"W, B. Hammel RELATIONSHIPS. This new si glomerulatis, calyce 0.5 mm longo, late lobulato; et al. 17851 (CR); Parque Nacional Corcovado, Rio rated from other Costa Ricai corolla tubulosa, ubique glabra, tubo 22-24 mm Sirena, 8°28'N 83°35'W, C. Kernan 1328 (CR), 8°31'N sarea by its leaves, which ha- longo, lobis 6-8 mm longis. 83°31 'W, R. Liesner 3084 (CR). PUNTARENAS-SAN JOSE when fresh, and turn black whe BORDER REGION: Tarrazu, faldas de Cerro Nara cerca color is alluded to in the specifi TYPE. Costa Rica, Heredia. Finca La Selva, the Esquipulas, 9°29'N 84°03'W, J. Gomez Laurito et al. the flowers are distylous or mi OTS field station near Puerto Viejo de Sarapiqui, 11594 (CR, DUKE, MO, usj). known. 134 1991] TAYLOR ET AL.: NEW RUBIACEAE OF LA SELVA 135

tural History, Ol Hammel, Coussarea psychotrioides bed. The new combinations Chione n 1. Taylor & W. Burger, Psychotria lamrnel, and Psychotria guapilensis , Faramea parvibractea Steyermark, 3 sta Rica for the first time.

;ion of the Rios Puerto Viejo and I m, 5 Nov 1980, B. Hammel 10383 . trees to 7 m tall, drying black. ate; blades elliptic, 8-20.5 cm long, ie, acute to slightly acuminate at : at base, thinly chartaceous; sec- 9-11 pairs, without domatia; pet- im long; stipules interpetiolarly and f connate, persistent, triangular, 1 . 5- lallowly bilobed. Inflorescences ter- ibiform to pyramidal, 1-2 cm long iduncles ca. 2 cm long; bracts tri- ate, 1-3 cm long, caducous; flowers nerules of 3-7, bisexual, 5-merous, .y pubemlent, the limb 0.5 mm long, ihallowly lobed; corolla salverform, >us, the tube 22-24 mm long, the FIGURE 1. A, Coussarea nigrescens, habit with inflorescence. B, flower. From Hammel 10383 (DUKE). te, 6-8 mm long. Fruit globose to 1 cm in diameter, black; pyrenes ;e to ellipsoid or planoconvex, PHENOLOGY. Collected in flower in April, July Coussarea psychotrioides C. M. Taylor & Ham- and September to November and in young fruit mel, sp. nov. FIGURE 2. in February. 'ECIMENS EXAMINED. Costa Rica. HERE- Arbor usque ad 12 m alta, glabrescens. Folia e Sarapiqui, 2 km S of Magsaysay Penal HABITAT AND DISTRIBUTION. Infrequent in wet irwood et al. 1129 (CR). LIMON: Canton petiolata oppositaque; laminis ellipticis, 8-18 x ;rro Muchilla, Fila Matona, 9°46'50"N and moist forest at 20-850 m. Caribbean slopes 2.5-6.5 cm; stipulis persistentibus, truncatis ad R. Robles & A. Chacon 2667 (CR). and the Osa Peninsula of Costa Rica. parum bilobatis, 0.5-1 mm longis. Inflorescentia Canton de Osa, Reserva Forestal Golfo RELATIONSHIPS. This new species can be sepa- rotundata usque pyramidalis, 3-7 x 5-8 cm; pe- gre, 8°31'40"N 83°26'30"W, B. Hammel rated from other Costa Rican species of Cous- dunculo 1-3 cm longo. Flores sessilis glomeru- (CR); Parque Nacional Corcovado, Rio sarea by its leaves, which have a velvety sheen latis; calyce 0.3 mm longo, subtruncato; corolla si 83°35'W, C. Kernan 1328 (CR), 8°31'N hypocrateriformi, ubique glabra, tubo 12-15 mm 'Jesner 3084 (CR). PUNTARENAS-SAN JOSE when fresh, and turn black when dried. This dried color is alluded to in the specific epithet. Whether longo, lobis 10-12 mm longis. Fructus ellipsoi- ON: Tarrazu, faldas de Cerro Nara cerca deus, 1.5-2 cm longus. '°29'N 84°03'W, /. Gomez Laurito et al. the flowers are distylous or monomorphic is un- UKE, MO, usj). known. TYPE. Costa Rica, Heredia. Finca La Selva, the