Flora of Dominica, Part 2 - Smithsonian Institution Libraries

36 ASTERACEAE SMITHSOMAN CONTRIBUTIONS TO BOTANY
Chromolaena odorata
Chromolaena odorata (Linnaeus) King & Robinson, 1970b:204.
EyFwrtoriwn odoratwn haeus, 1759a:1205.--Domin, 193Od:64.
Osmia odorata (Linnaeus) C. Schultz, 1866:251.
Pubescent subshrub; leaves deltoid to rhombic, membranous,
upper margin with a few (c10) large teeth, red
gland-dotted beneath, often obscured to the naked eye by dense
pubescence.
Southeastern U.S. to Argentina, adventive in Old World;
occasional in disturbed places on dry scrublands along west
coast of Dominica, sometimes in interior: Carib Point (King
6327), Dublanc (Whitefoord 5345), Grand Bay, Berekua (King
6320), La Plaine (King 6372), La Ronde (King 6364),
Macoucheri (Chambers 2733), Mero (Chambers 2784), Mt.
Joy (Cooper 59, Hodge 1085), Pointe Michel (King 6308).
Flowering December-February.
Adjanohoun et al. (1985:81, pl. 47) reported the same
medicinal usage as for Hebeclinum mucrophyllum.
Chromolaena trigonocarpa
Chromolaena trigonocarpa (Gnsebach) King & Robinson, 1978:207.
Eypltoriwn trigonocarpwn Gnsebach, 1861 :359.--Domin, 193Od:65.
Eypltoriwn mononewwn Urban, 1903,3:392.--Domin, 193Od:G.
Chromolaena mononeura (Urban) King &Robinson, 1976:203.
Pubescent to glabrescent subshrubs; leaves serrate, glanddotted
beneath, smooth to bullate, acute at base, usually
acuminate at apex; heads pedicelled; involucral bracts 3-
veined, only one vein colored in pale-bracted aspects; achenes
3-5-ribbed.
Guadeloupe, Martinique (possibly elsewhere in Lesser
Antilles, such as St. Kitts); common in Dominica at mid- to
highest elevations in disturbed places: Belle Fille (King
6355*), Bellevue (King 6313*), Deux Branches (Chambers
(mononeura, asterisked) vs. open sun (trigonocarpa), rather
than genetics.
In a well-developed mononeura aspect one finds (1) whitish
involucral bracts resulting in only 1 of the 3 bract-veins being
colored, (2) plants more glabrous, (3) internodes rather longer,
and (4) leaves rather larger and smoother. These tend to be from
lower elevations, possibly better correlated with growing in
shade.
In a well-developed trigonocarpa aspect one finds (1)
brownish involucral bracts, resulting in all 3 bract-veins being
colored, (2) plants more pubescent, (3) internodes rather
shorter, and (4) leaves rather smaller and strikingly bullate.
These tend to be from higher elevations, possibly correlated
with growing in exposed and sunny situations.
The type of Eupatorium trigonocarpum is an Imray (no. 51
teste Domin, 19W.65) collection from Dominica, at Kew,
without locality. The type material of E. mononeurum is cited
as Eggers 71 and 1451, from Morne Gombo, a locality
unknown to me. However, Eggers 1451 was collected Dec
1883 at Laudat (30003, on the way to Freshwater Lake.
Clibadium Linnaeus
1. Leaves conspicuously and irregularly incised-serrate
(erose); central (male) florets subtended by pales, with
short hairs at top. . . . . . . . . . . . . . . . C. erosum
1. Leaves inconspicuously serrate; central (male) florets not
subtended by pales, with long, multicellular hairs at top
. . . . . . . . . . . . . . . . . . . . . . . . . C. sylvestre
Clibadium erosum
Clibadiwn croswn (Swartz) A.P. Candolle, 1836,5:506.--0. Schulz in Urban,
1911,7:81.--Domin, 193Od:71.--Stehlk, 1954b:75.
TriTir crow Swartz, 1788:llS.