Flora of Dominica, Part 2 - Smithsonian Institution Libraries

194 RUBIACEAE SMITHSONUN CONTRIBUTIONS TO BOTANY
Psychotria discolor
Psychotria discolor (Grisebach) Rolfe, 1893:258.-Adams, 1972723.
Psychotria uliginosa var. discolor Smith ex Grisebach. 1861:340.
Psychofria caribaea Urban. 1913,7:437.
Succulent herb to 2 m; stipules broad, rounded, and
deciduous; leaves large, obovate, attenuate below, rounded
above; inflorescence short, axillary, puberulenc flowers and
hits white.
Jamaica, Guadeloupe, Martinique; known in Dominica only
from the vicinity of Freshwater and Boeri Lakes in dense shade,
-800 m: (Chambers 2586, Ernst 1721, 1856, 2168, Wilbur
8201).
Remarkably similar to P. uliginosa in habit but the
inflorescence is totally different.
I fiid no useful distinction between Jamaican P. discolor and
Lesser Antillean P. caribaea and have synonymized the latter.
Joseph Kirkbride, a specialist in Rubiaceae, pointed out (pers.
comm.) that this species is, as Urban said in describing F!
caribaea, very similar to Psychotria macrophylla Rub & Pavdn
of Central and South America. Perhaps this taxon is, at best,
only an Antillean subspecies of F! macrophylla with a
subsessile inflorescence.
Psychotria guadalupensis
Psychotria guadalupensb (A.P. Candolle) Howard, 1966: 139.Steyermark,
1972569.
Viscoidespendulwn Jaquin, 1763:73. pl. 51: fig. 1.
Psychotria parasitica Swam, 1788:44, nom. superfl.
Loranthur guadalupensis A.P. Candolle, 1830,4294.
Loranthw portoricensis A.P. Candolle, 1830,4:293.
Mapouria parasitica Schumann in Engler & Prantl, 1891, IV(4): 112.
Psychotria pendula (Jaquin) Urban, 1900,1:445, non J. Hooker.
Pendant and often succulent epiphyte; stipules papery,
tubular-truncate, 1-2 mm long, eventually lost; inflorescences
usually terminal, loose, often red; flowers white; fruits red,
tuming black.
Antilles into South America; frequent in Dominica from
100-1300 m, particularly fleshy on ridges and summits: La
Chaudiere (Hodge 3640), Morne Diablotins (Fishlock s.n.,
Hodge 2615, 2905, Webster 13350, Whitefoord 4235, 57413,
Pont Casse area from Sylvania to Deux Branches and to
summit of Trois Pitons (Chambers 2593, 2607, Cooper 91,
195, Ernst 1211, Haweis 29, Hodge 714, 717, 1044, 1409,
1737, 3103, Lloyd 38 (andlor 41?), Nicolson 1808,2126, Skog
1574, Wilbur 7722, 7806,8102), Freshwater Lake area (Burch
1467, Eggers 52,670, Hodge 1792, Smith 10299, Wasshausen
& Ayensu 341), Boiling Lake area (Hodge 1927), Southern area
(Beard 251, Hodge 715, 716,1456,2286, Stern & Wasshausen
2504, Wilbur 7920, sine loc. (Zmray 134).
Steyermark (1972:569) cited both F! guadalupensis subsp.
guadalupensis (corolla 6-7 mm long) and Psychotria guadalupensis
subsp. grosourdyana (Baillon) Steyermark (corolla
2.5-4 mm) for Dominica. All corollas measured on Dominican
specimens appeared to be 5-6 mm long, except for Wilbur
7722 (fruiting) on which the only open corolla found was 4.5
mm (a duplicate at NY was annotated by Steyermark as subsp.
grosourdyana). Howard (1989,6:446) pointed out that corolla
length may be associated with heterostyly.
Psychotria mapourioides
Psychotria mpourioides A.P. Candolle, 1830, 4:509.--Steyemark,
1972457.-Howard. 1989,6:446.
Mapouria guianensis Aublet, 1775:175. pl. 67, not Psychotria guianensis
(Aublet) Rusby, based on Palicourea guianensis Aublet.
Psychotria nit& Willdenow, 1798,1:963, nom. superfl.
Psychotria mpwia Schultes in Roemer & Schultes, 1819,5:1&7, nom. superfl.
Psychofriafloribunda sensu Grisebach, 1861:340, non Kunth, fide Steyermark,
1972457.
Shrub or tree to 9 m; stipules deciduous, >1 cm long, blunt
or rounded; inflorescence terminal, typically long-pedunculate;
calyx truncate, rim ciliate with tiny teeth much shorter than
hypanthium; fruit turning red.
Antilles into northern South America; occasional in Dominica
from near sea level to 750 m: East coast from Salybia to
Rosalie (Chambers 2631, Ernst 1677, Hodge 3313, Nicolson
4133, Stehle 6642, Stern & Wasshausen 2483), Morne aux
Diables area (Wasshausen & Ayensu 377, Wilbur 8065),
Syndicate (Ernst 2003, Wasshausen & Ayensu 344, Whitefoord
3537, 5622), Jean (Webster 13496), Sylvania (Hodge 712),
Freshwater Lake area (Gillis 8168, Lloyd 210, 217, 260),
Southwest area from Roseau to Morne Plat Pays (Cooper 175,
Lloyd 689, Nicolson 2098, Stern & Wasshausen 2492, Webster
13490), sine loc. (Zmray s.n.).
This treatment is provisional because neither the taxonomy
nor the nomenclature is settled. Steyermark does not quite
dispose of the oldest name, Psychotriafloribunda Kunth, and
it is not clear that P. mapourioides sensu Steyermark reaches
the Lesser Antilles.
Psychotria microdon
Psychotria microdon (A.P. Candolle) Urban, 1928, 9:539.-Steyermark,
1972446.
Rondeletia microdon A.P. Candolle, 1830, 4:408.
Psychotria pinnularis Sesd & Mocino. 189257.
Shrub to 2 m; stipules persistent, 1-2 mm long, ciliate;
inflorescence terminal, loose; calyx f truncate; flowers white.
Antilles into South America and Costa Rica; apparently a
new record for Dominica where it is occasional in dry
woodlands along west coast: northern Grand Savanna (Ernst
1639), lower Layou Valley (Ernst 1509,2179).
Psychotria tenuifolia
Psychotria tenuifolia Swartz, 1788:43.-Britton & Wilson, 1925,6:247.
Shrub or small tree; stipules deciduous, acute, and often
bifurcate; inflorescences short-peduncle& calyx with deltoid
lobes.