Semiramisis karsteniana Klotzsch, Linnaea 24: 26. 1851.  Ceratostema karsteniana (Klotzsch) Hoerold, Bot. Jahrb. Syst  42: 276.  1909.   Type.  Venezuela. Aragua:  Parque Nacional Henry Pittier, cloud forest on ridge along trail above Pittier monument, 19 Jun 1960 (fl), Steyermark 86322 (neotype, designated by Luteyn, 1984: VEN).  The holotype (Karsten 169, Venezuela, Puerto Cabello) was deposited at B and destroyed during World War II;  no other authentic material is known to exist.  The holotype was photographed under F neg. 4647 and ACS neg. 37 (NY).

         Epiphytic shrub from lignotubers to 10 cm diam.;  stems glabrous, striate, subterete to complanate.  Leaves subcoriaceous, narrowly ovate to ovate, 6-11 x 2.5-4 cm, basally rounded, apically acuminate, marginally plane;  3-5-plinerved, the inner nerves arising above the base, the midrib impressed above and raised beneath, the lateral nerves and reticulate veinlets slightly raised on both surfaces;  petiole terete, 2-4 mm long, glabrous.  Flowers solitary in axils of uppermost leaves;  floral bract not seen;  pedicels subrugose, glabrous, ca. 20 mm long;  bracteoles near or above middle of pedicel, lanceolate, ca. 2 mm long;  calyx angled, glabrous, ca. 6-10 mm long;  hypanthium 4-8 mm long;  limb ca. 2 mm long;  lobes less than 1 mm long;  corolla cylindric-campanulate, puberulent, 35-44 mm long, when fresh 9 mm in proximal diam. to 18 mm distal diam. and green in the proximal one-third and red in the upper two-thirds, the lobes deltate, 3-4 mm long and 7-8 mm broad;  stamens ca. 35-38 mm long;  filaments distinct, marginally pilose in the distal half, 5-6 mm long;  anthers 34-35 mm long;  thecae ca. 6 mm long;  tubules dehiscing by oblique, subterminal clefts ca. 1.5 mm long.  Berry not seen.

         Distribution.  Very rare epiphytic shrub in cloud forests of the Cordillera de la Costa and the Serrania del Interior, Venezuela, from 1000 m to 1300 m  elevation.  Flowering specimens have been collected in January, June, October, and December.