Jumellea anjouanensis (Finet) H. Perrier

Rakotoarivelo, Fanny, Pailler, Thierry & Faliniaina, Lucien, 2013, Revision of the genus Jumellea Schltr. (Orchidaceae) from the Comoros Archipelago, Adansonia (3) 35 (1), pp. 33-46 : 42

4. Jumellea anjouanensis (Finet) H. Perrier

( Fig. 6 )

Perrier de la Bâthie in Humbert H. (éd.), Flore de Madagascar, 49 e fam., Orchidées 2: 170 (1941); Stewart et al., Angraecoid orchids: 186 (2006).

— Basionym: Angraecum anjouanense Finet , Bulletin de la Société Botanique de France 54 (Mémoire 9): 11 (1907).

— Lectotype (designated here): Comoros, Grande Comore? Anjouan?, V.1850, Boivin s.n. (lecto-, P [ P00115682 ]!) , Lavanchie 35 (isolecto-, P [ P00115683 ]!).

SPECIMENS STUDIED. — Comoros. Anjouan, Moya road , Rakotozafy 1094bis ( P [ P00115684 ]!). — Grande Comore, forest above Kourani, Piste du Capitaine du Bois, II.1975, Floret 929 ( P [ P00213129 ]!) ; La Grille Massif, V.1981, Doutrelepont s.n. ( P [ P00115686 ]!) ; Maoueni, La Grille forest, 780 m, XI.1999, Labat et al. 3090 ( P [ P00183941 ]!) ; Mitsoudje, Nyumbadju, 450 m, XI.1999, Labat et al. 3134 ( P [ P00183998 ]!) ; Mvouni, 1900 m, XI.1999, Labat et al. 3165 ( P [ P00184037 ]!) ; Bahani, 950 m, VIII.2000, Brionnaud et al. 52 ( P [ P00216043 ]!, CNDRS) ; Karthala, 1880 m, VIII., Brionnaud et al. 62 ( P [ P00216056 , P00216057 ]!) ; La Grille, 27.II.2009, Rakotoarivelo et al. 038 ( REU!). — Mohéli, Ouhala II, 401 m, 2.III.2009, Rakotoarivelo et al. 081 ( REU!).

DISTRIBUTION. — Madagascar, Comoros. Mostly in the humid forest, from 400 to 1900 m elevation.

DESCRIPTION

Epiphyte up to 50 cm high, stem compressed, stiff, erect or pendant, branched, sometimes covered with small protuberances of aerial roots. Aerial root appearing along the stem, on the internodes covered with old and dry leaf sheaths. Leaves small (20-55 × 5-6 mm), oblong, conduplicate, slightly bilobate. Leaf sheath adnate to the stem. Inflorescence small; peduncle very short (2-3 mm) covered by 4-imbricate sterile and tubular bracts. Pedicellate ovary three times longer than the peduncle (15-16 mm), fertile bract thin (6-8 mm long) and tubuliform. Flower diaphanous white; sepals and petals oval, of the same size (13.5-15 × 2.5-3.5 mm), acute. Lip pandurate or ovate, flat on the surface (15-16 × 4 mm), carinate (2.5 mm), slightly narrowed in the middle, widened at the base and at the upper part, apiculate. Spur 11-12 mm long, swollen at the apex. Column thin and very short (1.5-2 mm long and 1-1.5 mm high); lobes of the rostellum acute at the external tips inbetween which a very small and acute median tongue of rostellum is visible. Anther cap crested on the surface. Capsule fusiform, 2-3 cm long.

Figures

FIG. 6. — Jumellea anjouanensis (Finet) H. Perrier: A, habit; B, flower, side view; C, pieces of the perianth; D, pedicellate ovary and spur. Abbreviations: ms, median sepal; ls, lateral sepals; pt, petals; lp, lip. Scale bars: A, 2 cm; B, 5 mm; C, 1 cm; D, 3 mm.