Flora of Dominica, Part 2 - Smithsonian Institution Libraries

NUMBER 77
MY RSINACEAE-MY RTACEAE 161
1. Inflorescences terminal
1. Inflorescences axillary .
Stylogyne A.L. Candolle
......... S. canaliculata
........... S. laterifora
Stylogyne canaliculata
Stylogyne canaliculata Wdiges) Mez in Engler, 1902, IV.236 (Heft 9):268.
Ardisia canaliculata Mdiges, 1825.
Stylogyne smithiorum Mezin Urban, 1901.2418.
Ardisia clusioides sensu Grisebach, 1861:3% [as to Dominica specimens], non
Grisebach [as to Jamaican materials].
Courocoume.
Shrub or small tree to 5 m; leaves elliptic to obovate, base
rounded, to 30 cm x 10 cm; inflorescence a loose, terminal
panicle to 15 cm long; pedicels 3 (flower) to 9 (fruit) cm long;
corolla white, 4 mm long; fruits globular, red, 5-6 mm.
Martinique to Grenada; in lowland forests of Dominica:
Carib Trail (Hodge 3254), Concord (Ernst 1672), Layou River
(Beard 1458), Morpo (Chambers 2550), Newfoundland (Nicolson
4092), Riversdale (Beard 641), Salybia (Hodge 3363).
One specimen label reported that ink is made from the fruits.
Stylogyne lateriflora
Stylogyne Iaterijlora (Swartz) Mezin Urban, 1901,2:418.4tehlC, 1962b:437.
Ardisia lateriflora Swartz, 1788:48.
Ardisia caribaea Miquel in Martius, 1856. 10:289.
Ardsia lawifoh sensu Grisebach, 1861:385, nm Jussieu.
Slender tree to 10 m; leaves broadly elliptic, to 20 cm x 10
cm; inflorescence a loose, axillary panicle to 8 cm long; corolla
pinkish, 4 mm long; fruiting pedicels to 9 mm long; hits
globular, black-purple, 6-7 mm.
Lesser Antilles; in rainforests of Dominica from lower to
upper elevations: Bataca (Stehle 6406, 6644), Clarke Hall
(Nicolson 1824, Stern & Wasshausen 2409), Dleau Gommier
(Ernst 2084), En Haut Jean (Webster 13498), Hatton Garden
Estate (Hodge 3049). Laudat (Whitefoord 3849), Layou
headwaters (Nicolson 4186), Morne Anglais (Hodge 668,
Wilbur 7942), Mome Colla Anglais (Hodge 667,1029,1184),
Mome Diablotins (Nicolson 191 9, Webster 13328, Whitefoord
4418), Morne Plaisance Estate (Whitefoord 4690), Petit
Coulibri (Whitefoord 6005), South Chiltem (Hodge 1499),
Sylvania (Cooper 62), Syndicate (Whitefoord 4473).
MYRTACEAE
The first draft was prepared by Robert DeFilipps. Richard
Howard, with the permission of the author, later gave me a
copy of Rogers McVaugh’s typescript of the family for Howard
(1989, 5:463-532). This typescript was used extensively in
preparing the treatment of this difficult family.
Eucalyptus is surely grown in Dominica but no collections
have been seen. It belongs to a group that have broad, alternate
leaves, except for juvenile shoots that may be opposite.
Melaleuca linearifolia Smith, an Australian tree with
alternate, linear leaves, spicate inflorescences and connate,
fascicled stamens, is grown in the Roseau Botanic Garden
(Hodge 391 1). Melaleuca quinquenervia (Cavanilles) S.T.
Blake is reported for Dominica by McVaugh (in Howard,
5465).
Generic Identification Key
1. Flowers few, usually 1 cm across.
3. Flowers k solitary, axillary; young stems 4-angled
Psidium guajava
...................
3. Flowers racemose, terminal: stems terete ......
................... Syzygium jambos
1. Flowers many, usually >10 to an inflorescence.
4. Hairs medifixed; petals absent; calyx calyptrate, circum-
Calyptranthes
scissile ..................
4. Hairs usually simple or absent; petals present; calyx
splitting irregularly or sepals free.
5. Branchlets winged; petals glabrous outside .....
........................ Pimenta
5. Branchlets not winged, petals pubescent outside.
6. Sepals concrescent in bud, splitting irregularly at
anthesis .............. Blepharocalyx
6. Sepals free.
7. Leaves revolute from midrib (concave); anther
locules at different levels on each side
.................... Gomidesia
7. Leaves flat; anther locules all at same level
...................... Myrcia
Generic Classification Key
(from McVaugh, 1968:414-417)
1. Inflorescence 1-few-flowered (rarely >30), if compound
then racemose, or determinate at the lowest node and
regularly dichotomous with sessile flowers in the forks.
2. Embryo eugenioid (massive and undivided) ......
......................... Eugenia
2. Embryo pimentoid (elongated with cotyledons small
and inconspicuous at one end) ........ Psidium
1. Inflorescence myrcioid (“paniculate”).
3. Embryo pimentoid (elongated with cotyledons small
and inconspicuous at one end).
4. Calyx closed in bud, splitting irregularly at anthesis
(into 4); ovules 4-6; inflorescence a panicle but each
branch a 3(-7)-flowered dichasium .........
.................... Blepharocalyx
4. Calyx lobes 5 (ours) or 4; ovules 1 or few;
inflorescence truly paniculate ........
Pimenta