|
(Last Modified On 6/4/2013)
|
|
|
|
(Last Modified On 6/4/2013)
|
|
Species
|
Critonia billbergiana (Beurl.) R. M. King & H. Robinson
|
|
PlaceOfPublication
|
Phytologia 22: 48. 1971.
|
|
Synonym
|
Eupatorium billbergianum Beurl., Kongl. Svenska Vetenskapsakad. Handl. 1854: 134. 1856. TYPE: Panama, near Porto Bello, Billberg 300 (S).
|
|
Description
|
Sparsely branching woody vines; stems greenish to pale brownish, terete, scarcely striate, glabrous. Leaves opposite; blades ovate, to 11 cm long and 5 cm wide, the base cuneate to somewhat rounded, parallel to the long basal secondary veins, the margins remotely serrulate to subentire, the apex slightly short- acuminate, the surface usually glabrous, sometimes sparsely pilose below on veins, the venation subpinnate to trinervate, the second pair of secondary veins most prominent; petioles to 2 cm long. Inflorescence pyramidally paniculate with the lowest branches in the axils of normal leaves, the branches densely corymbose with branchlets bearing few heads, glabrous to puberulous, the ultimate branches 0-4 mm long. Heads 9-12 mm high with 8-9 florets; involucral bracts 20-25, imbricate to subimbricate, in 4-5 series, 1-6 mm long and 1.5 mm wide, ovate to oblong- lanceolate with narrowly rounded apex, the innermost bracts acute, coriaceous, the outer surface glabrous; corolla whitish, 5-7 mm long, tubular or with a narrowly funnelform limb, glabrous, the lobes ca. 0.5 mm long, narrowly triangular; style branches slightly broadened distally. Achenes 3-4 mm long with 5-6 narrow ribs, numerous hairs on upper part, glabrous below, the achene base scarcely narrowed with broad carpopodium; pappus of ca. 40 crowded bristles partially in second series, 5-7 mm long, the bases of the bristles with distinct margins and flattened outer surfaces, the tips slightly but distinctly enlarged.
|
|
Habit
|
woody vines
|
|
Distribution
|
known from British Honduras, Guatemala, Honduras, Costa Rica, and Panama.
|
|
Note
|
The plants seem to be strictly vines and have less branched inflorescences and distinctly larger heads than either of the other Panamanian species.
|
|
Specimen
|
BOCAS DEL TORO: Water Valley, vic. of Chiriqui Lagoon, von Wedel 1817 (MO). CANAL ZONE: Chagres, Fendler 154 (MO). Cerro Galera, 350-400 m, Gentry 6622 (MO). Pipeline road 5-6 mi N of Gamboa, Gentry 6672 (MO). COLON: Portobelo, Billberg 300 (S). PANAMA: Cerro Azul, Dwyer 3071 (MO). Cerro Campana, Dwyer et al. 4714 (MO). Madden Lake, Gentry & Tyson 5033 (MO). 2-3 mi S of Goofy Lake, 2000-2200 ft, Lewis et al. 265, 285 (both MO). SAN BLAS: Isla Soskatupa, Duke 8944 (MO, REED).
|
|
Tag
|
|
|
|
Project Name
|
|
Tag
|
|
|
|