DIOGENESIA Sleumer, Notizbl. Bot. Gart. Berlin-Dahlem
12: 121. 1934; Smith, A. C., Contr. U.S. Natl. Herb. 29(8): 350-355.
1950; Sleumer, H. O., Notes Roy. Bot. Gard. Edinburgh 36(2): 251-258.
1978; Luteyn, J. L., Fl. Ecuador 54: 363-370. 1996. Type: Diogenesia octandra Sleumer.
Eleutherostemon Herzog, Meded. Rijksherb. Leiden 27:
22. 1915, non Klotzsch (1838). Type: Eleutherostemon racemosum Herzog [=Diogenesia racemosa (Herzog) Sleumer].
Small shrubs, usually epiphytic, with slender,
often elongate and pendent branches, occasionally climbing. Leaves
alternate, subcoriaceous to coriaceous, margin entire, 3-5-plinerved, short-petiolate;
bud scales generally distinct (=Sleumer's pseudostipule). Inflorescences
axillary, in few- to many-flowered fascicles or racemes, very rarely reduced
to a solitary flower; pedicel slender, bibracteolate about midway
along pedicel. Flowers 4-5-merous, without odor; aestivation
valvate; calyx continuous with pedicel; hypanthium campanulate,
rounded at base, truncate at apex, smooth or indistinctly 5-ribbed;
limb and lobes short, suberect; corolla cylindric, urceolate or campanulate,
shortly lobed to -partite halfway; stamen 4, 5, 6, 8 or 10, equal
in length, ± as long as or slightly shorter than corolla;
filaments distinct, longer or shorter than anthers, lacking spurs, pubescent;
anthers oblong, lacking disintegration tissue; thecae smooth or faintly
granular; tubules as long as or longer than the thecae, dehiscing
by an introrse oval pore or cleft; pollen lacking viscin threads;
nectariferous disc usually prominent, thick-annular, entire or crenulate,
rarely conical; ovary inferior; style slender, equalling the
corolla in length or long-exserted; stigma truncate. Fruit
a juicy berry, subglobose, when immature pericarp thin and
brittle, when mature subcoriaceous, usually purple to blue-black;
seeds numerous, the embryo green.
A genus of 13 species ranging from Venezuela
to northern Bolivia.
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