Flora of Dominica, Part 2 - Smithsonian Institution Libraries

NUMBER 77
FQRTULACACEAE-RHLZOPHORACEWE
183
Plants with conspicuous axillary tufts of hairs; leaves linear;
flowers yellowish; capsule circumscissile well below middle;
seeds black, granular.
Neotropics; only once collected in Dominica on dry west
coast: Colihaut (Lloyd 855).
Portulaca pilosa
Portulaca pilosa Linnaeus, 1753:445.-hgrand, 1%2:80.
Plants with conspicuous axillary tufts of hairs; leaves linear;
flowers reddish; seeds black, tuberculate.
Widespread weed, in Dominica, usually along dry west
coast Carib Reserve (StehlC 6647), Colihaut (DeFilipps 183,
Lloyd 861), Grand Savanna (Hodge 3788, Lloyd 838, Wilbur
7670, 7671), Portsmouth (Hodge 441), Scotts Head (Hodge
1622, Lloyd 513).
The second Wilbur collection from the Grand Savanna
(7671) has remarkably large petals (-1.5 cm long) but
otherwise was noted to be like the rest of the population
represented by Wilbur 7670. At one point it was thought that
this was I? grandiflora W. Hooker, an occasionally introduced
and cultivated species, but it does not have the steely gray seeds
with stalked tubercles of that species. Adams (1972:267) noted
that I? pilosa has petals only 4-6 mm long.
Talinum Adanson
Talinum paniculatum
Tdinumpaniculatwn (Jacquin) Gaermer. 1791,2:219.
Portulaca paniculara Jacquin, 1760:22.
Talinumpatens Willdenow, 1800,2:863.
Glabrous herb to 1.2 m; leaves succulent; inflorescence
much branched; petals pink.
Neotropics; in Dominica along dry west coast: Colihaut
(Ernst 1142, Lloyd 854), Loubikre (Hodge 3871), Massacre
(Whitefoord 4637), Portsmouth (Hodge 442), Rodneys Rock
(Nicolson 4052), Salisbury (Wilbur 8108).
Adjanohoun et al. (1985:167, pl. 133) reported medicinal
uses of the leaf juice.
RANUNCULACEAE
Clematis dioica
Clematis dioica Linnaeus, 1759:1084.
Clematis dm’nicana Lamarck, 1786,2:45.
Clematis dioica var. dominicoma (Lamarck) Kuntze, 1885:102.
Dioecious or polygamous vine with twining petioles; leaves
opposite, 3-5-foliolate; sepals petaloid, 4; achenes with long,
plumose style.
Neotropics; apparently rare in interior rainforest of Dominica
600-750 m: Baiac (Whitefoord 3832), Mome Colla Anglais
(Hodge 408), Sylvania (Hodge 807 of Ipomoea tiliacea
includes a few leaves of this species), sine loc. (Imray 117 at
K). Hodge 408 was flowering (staminate) in August.
Some Imray collections (K) have been annotated by Lourteig
as “C. dioica var. brasiliana (DC.) Eichl.,” indicating that they
should be 4-5-foliolate (teste Lourteig, 1956:36-37). Among
the duplicates of Imray 117 (K), there are 1-, 3-, and 5-foliolate
branches. I cannot accept the var. brasilianu, as the key
character appears to vary within the Same collection. Clematis
dominicana was described as having 3-foliolate leaves.
RHAMNACEAE
(by R. DeFilipps)
A sterile specimen of Zizyphus sp., Fairchild 2781, was
collected in the Roseau Botanic Gardens in 1932 as “Z. oeoplia
Mill. aff.” The leaves seem to have tawny pubescence beneath.
Asian Zizyphus mauritiana Lamarck (incl. Zizyphus jujuba
(Linnaeus) Lamarck, non Miller), with stipular thorns and
leaves white-tomentose below, may be cultivated in Dominica.
1. Climber with tendrils; leaves alternate; ovary inferior; fruit
a 3-winged capsule . . . . . . . . . . . . . . . Gouania
1. Tree or shrub; leaves f opposite; ovary superior; fruit a
drupe . . . . . . . . . . . . . . . . . . . Krugiodendron
Gouania Jacquin
Gouania lupuloides
Gouania lupuloides (Linnaeus) Urban, 1910,4:378.-Whitefoord. 1989:144.
Banistcria lupuloides Linnaeus, 1753:427.
Gouania domingensis Linnaeus, 1763:1663.-Grisebach, 1860:lOl.
Climbing or trailing shrub; leaves serrate, apex acute; petals
5, hooded.
Central America and Antilles; apparently rare on Dominica:
Dublanc (Whitefoord 5202), Petit Coulibri on south coast
(Whitefoord 4 60, sine loc. (Imray 45 at K). Flowering in
November, fruiting in January.
Krugiodendron Urban
Krugiodendron ferreum
Krugiodendron ferrewn (Vahl) Urban, 1902.3:3 14.
Rhamnus ferreus Vahl, 1794,3:41.
Condalia ferrea (Vahl) Grisebach, 1860:lOO.
Tree or shrub; leaves entire, apex emarginate; petals absent.
Central America and Antilles to Venezuela; apparently rare
in Dominica on dry west coast near sea level: Prince Ruperts
Head [Cabrits] (Finlay? s.n. at K).
RHIZOPHORACEAE
The mangrove, Rhizophora mangle Linnaeus, a small tree of
tidal mudflats, has not yet been collected on Dominica. As