Tolumnia

Rafinesque

Fl. Tellur. 2: 101. 1837.

Etymology: Probably for Tolumnius, a Rutulian mentioned by Virgil
Synonyms: Xaritonia Rafinesque
Treatment appears in FNA Volume 26. Treatment on page 651. Mentioned on page 496.
 TaxonIllustrator 
FNA26 Plate 108.jpegBrassia caudata
Ionopsis utricularioides
Macradenia lutescens
Oncidium ensatum
Trichocentrum undulatum
Tolumnia bahamensis
Barbara Alongi
Barbara Alongi
Barbara Alongi
Barbara Alongi
Barbara Alongi
Barbara Alongi

Herbs, epiphytic or rarely terrestrial, ± climbing, fan-shaped. Rhizomes often elongate, covered with bracts; pseudobulbs reduced to absent. Leaves: basal 3–7, apical not more than 1; blade recurved, lanceolate, laterally flattened–3-gonal, margins often serrulate. Inflorescences racemes or weakly paniculate; bracts narrowly triangular. Flowers: sepals and petals spatulate-clawed; lateral sepals sometimes partially connate; lip 3-lobed, pandurate, without nectar cavity; callus prominent tuberculate-lobulate; column with pair of outstretched apical wings, without hood; stigmatic cavity round; rostellum not prominent. Fruits capsules, ellipsoid.

Distribution

Restricted to s Fla, West Indies

Discussion

Species 30 (1 in the flora).

Tolumnia does not belong to the main body of Oncidium (its traditional placement) even though many of the species have floral morphologies nearly identical to that of Oncidium. It shares, with other twig epiphytes, a fan-shaped habit and seeds with prominent extensions of the testa.

Selected References

None.

... more about "Tolumnia"
self-pollination +
outstretched +
Mark W. Chase +  and James D. Ackerman +
Rafinesque +
indehiscent +
not +  and articulate +
conduplicate +  and plicate +
flattened-3-gonal +  and lanceolate +
triangular +
tuberculate-lobulate +
Restricted to s Fla +  and West Indies +
Probably for Tolumnius, a Rutulian mentioned by Virgil +
3-merous +, sessile +  and pedicellate +
not +  and resupinate +
lateral +  and terminal +
petiolate +, sessile +  and simple +
duplicate +, convolute +, whorled +, opposite +, distichous +  and alternate +
cauline +  and basal +
reduced +
pandurate +  and 3-lobed +
larger +
differing in form and color +
1-many-flowered +  and cymose +
pendent +  and erect +
spatulate-clawed +
Fl. Tellur. +
aerial +  and subterranean +
not prominent +
minute +
free +, distinct +, adnate +  and connate +
spatulate-clawed +
foliaceous +
not +  and alike +
branched +, or +  and simple +
pendent +  and erect +
proliferous +
thickened +  and stout +
concave +  and convex +
Xaritonia +
Tolumnia +
Orchidaceae (tribe Maxillarieae) subtribe Oncidiinae +
annual +  and perennial +
herb +  and climbing +
saprophytic +, photosynthetic +  and mycotrophic +