Macradenia

R. Brown

Bot. Reg. 8: plate 612. 1822.

Etymology: Greek makros, large, and aden, gland, probably referring to the prominent viscidium, which is often referred to as a “gland”
Treatment appears in FNA Volume 26. Treatment on page 647. Mentioned on page 496.
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 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, cespitose. Stems with prominent, elongate pseudobulbs partially covered by bracts. Leaves per sympodium 1, rarely 2, apical, leathery; blade conduplicate, oblong-lanceolate, dorsiventrally flattened, margins entire. Inflorescences racemes, arising from base of pseudobulb, pendent; bracts narrowly triangular. Flowers: petals and sepals oblongelliptic, distinct and free; lip 3-lobed, without nectar cavity, callus shallow; column with prominent dorsal hood projecting over anther cap, otherwise without wings or arms; stigmatic cavity longitudinal; rostellum prominent, beaklike, projecting outward. Fruits capsules, ellipsoid, ± triangular in cross-section.

Distribution

Tropical and subtropical regions of Western Hemisphere

Discussion

Species 10–12 (1 in the flora).

Selected References

None.

... more about "Macradenia"
self-pollination +
Mark W. Chase +
R. Brown +
indehiscent +
not +  and articulate +
conduplicate +  and plicate +
flattened +  and oblong-lanceolate +
triangular +
Tropical and subtropical regions of Western Hemisphere +
Greek makros, large, and aden, gland, probably referring to the prominent viscidium, which is often referred to as a “gland” +
3-merous +, sessile +  and pedicellate +
not +  and resupinate +
triangular;ellipsoid +
lateral +  and terminal +
pendent +  and arising +
petiolate +, sessile +  and simple +
duplicate +, convolute +, whorled +, opposite +, distichous +  and alternate +
cauline +  and basal +
reduced +
3-lobed +
larger +
differing in form and color +
1-many-flowered +  and cymose +
pendent +  and erect +
free +  and distinct +
oblongelliptic +
aerial +  and subterranean +
minute +
free +  and distinct +
oblongelliptic +
foliaceous +
not +  and alike +
branched +, or +  and simple +
pendent +  and erect +
proliferous +
thickened +  and stout +
concave +  and convex +
Macradenia +
Orchidaceae (tribe Maxillarieae) subtribe Oncidiinae +
annual +  and perennial +
herb +  and cespitose +
saprophytic +, photosynthetic +  and mycotrophic +