Flora of Dominica, Part 2 - Smithsonian Institution Libraries

NUMBER 77 ASTERACME 45
Sporgonophorus wilkonfii Crantz, 1766, 1:261, nom. illeg. [incl. type of
Bhub sporgonophoro Linnaeus, 1763].--Domin, 19306:60.
Spargonophorus sporgonophorus (Linnaeus) Jeffrey, 1988:272, "spargonophoro,"
nom. inadmiss.
Herb; leaves alternate, elliptic -lanceolate, serrate; heads
axillary, sessile, to 1 cm across; involucral bracts ovatelanceolate,
acuminate to aristate; receptacle naked, florets all
bisexual and tubular, white or pink; achenes 4-angled, topped
by a whitish cartilaginous cupule to 1 mm long.
Throughout neotropics, introduced elsewhere; apparently
uncommon on Dominica in wet lowlands: Hatton Garden
(Hodge 3100), Sugar Loaf (Eggers 788).
Jeffrey (1s.) argued that Struchium Browne was not validly
published, citing Art. 42 (ICBN) as if Browne's new generic
names rested on species descriptions. As Dandy (1967:ll)
pointed out, Patrick Browne's generic names rest on generic
descriptions that are in the usual Linnaean format for generic
descriptions. These appear within the text for the first (or only)
species with three exceptions, the most critical being Phaelypea,
the only one for which there is no generic description.
The other two involve the generic description appearing on the
page before or under the second species.
I am not convinced that the epithet in Ethulia spurganophora
is a noun in apposition. The original form was Sparganophoros,
attributed to Vaillant. It appears that Linnaeus modified
the original form to agree with Ethulia, suggesting that his
usage was adjectival.
Synedrella Gaertner, nom. cons.
Synedrella nodflora
Synedrello nodifloro (Linnaeus) Gaertner, 1791,2:246.--Domin, 193Od:78.
Verbesino nodiJoro Linnaeus, 1755:B.
Weak-stemmed and pubescent herbs; leaves opposite,
3-veined, shallowly sermlate to k entire; heads crowded and k
sessile in axils; involucre few-bracted, outer 1-2 green, inner
dry and scarious; receptacle small, with scarious, elongate
pales; inconspicuous ray-florets female, yellow, with filiform
tube and short, 2-3-toothed ligule; disk-florets bisexual;
achenes of two types: those from ray-florets compressed,
2-winged, the wings with awns; those from disk-florets narrow,
with 2-3 awns at tip.
Neotropical, now widespread; common in disturbed places
of Dominica at low to mid-elevations: Cabrits (Whitefoord
3989), Canefield (Hodge 758), Carib Reserve (Hodge 3392),
Clarke Hall (Chambers 2638), Delices (Whitefoord 3673),
Fond Baron (Ernst 1963, King 6300), Fond St. Jean (King
6328), Grand Bay road (Ernst I589), Layou River valley (Ernsr
1527, 2186), Lisdara (Hodge 757, 2461), Mome aux Diables
(Wilbur 8066), Pointe Ronde (Hodge 2643), Pont Casse
(Chambers 2719), Ridgefield (Hodge 2182), South Chiltem
(Hodge 1510), Sylvania (Hodge 756).
Tithonia Desfontaines ex Jussieu
Tithonia diversjfolia
Tirhonlio diversifolio (Hemsley) A. Gray, 1883:5.-L.a Duke, 1982498.
Mirasollio diversifolio Hemsley, 1881,2:168.
Coarse subshrub to 3 m; leaves alternate, usually 3-5-lobed,
whitish beneath, base decurrent on petiole; inflorescence large,
terminal, long-peduncled, involucral bracts in 2 series; receptacle
convex, with 1 cm pales; outer ray-florets sterile, with large,
3-toothed, showy yellow ligules 3-6 cm long; achenes pilose,
-5 mm long, tipped by 2 unequal awns and 6-10 small scales.
Central American, introduced elsewhere but naturalizing and
sometimes a pess locally common in Dominica: Bataka
(Hodge 3185), Carib Reserve (Stehle 6439, Castleton Estate
(Webster 13411), King's Hill (King 6295), Springfield (King
6336, 6343, Whitefoord 5838), Sylvania (Wilbur 7718).
Tridax Linnaeus
Tridax procumbens
Tridaxprocwnbens Linnaeus, 1753:900.-Powell, 1965:80.
Trailing herbs; leaves opposite, serrate; heads longpeduncled;
involucral bracts in few series; receptacle convex,
with pales; ray-florets female, 3-lobed, white to pale yellow;
disk-florets bisexual, yellow; achenes villous, overtopped by
pales, pappus of many aristate bristles.
Central American but now a widespread weed; weed on
Dominica, common along west coast: Batali River mouth
(Chambers 2795), Canefield (Hodge 733), Goodwill (Ernst
1296, Wilbur 7578), Grand Savanne (Wilbur 7666), Loubiere
(Hodge 3856), Pointe Michel (King 6388), Roseau (Hodge
734), Salisbury (Whitefoord 5449).
Verbesina Linnaeus
1. Leaves deeply pinnatifid; heads 5-7 mm across; midlands
......................... K gigantea
1. Leaves denticulate; heads 12-15 mm across; montane
....................... V. howardiana
Verbesina gigantea
Verbesino gigontea Jacquin, 1784, Icon., 1(4):17, pl. 175; 1786, Coll..
1:53.-Uh, lW7,5:264.--DOmin. 1930d:73.--Stehle,1962d:365.
Herb to 2 m, finely pubescent; leaves alternate, lower ones
deeply 5-9-lobed, 4-16 cm x 2-8 cm; inflorescence corymbose;
involucre multiseriate, light brown; receptacle convex
with pales clasping achenes; florets white, ray-florets inconspicuous
(absent?); achenes flattened, broad-winged, with
pappus of 2 awns.
Scattered in Antilles, also Panama; low to midlands of
Dominica: Bellevue (King 6306, 6312), Fond Baron (King