Lobelia philippinensis subsp. negrosensis, 2011

Lammers, Th. G., 2011, Revision of the Malesian species of Lobelia section Rhynchopetalum (Campanulaceae: Lobelioideae), Blumea 56 (3), pp. 218-224 : 221

b. subsp. negrosensis Lammers , subsp. nov. — Fig. 1b

Plantae insulae Nigorum a plantis conspecificis in insula Luzonis bracteis latioribus 0.8–2 mm latis, calycis lobis angustioribus 0.7–0.9 mm latis, corollae tubo decurvato et lobis ventralibus connatis per 2/3 vel plurem longitudinis, superficie antherarum glabro, et barba antherarum ventralium breviore 1.5–2.5 mm longa distinguenda. — Holotypus: Philippine Plant Inventory 6380 ( BRIT), Philippines, Negros , Negros Occidental, Mt Dumalabdab , Talisay mun., 10°40'N, 123°16'E, hill forest, rocky clay, 1160 m, 25 Mar. 1992 .

Stems glabrous. Leaves glabrous. Bracts 14–26 by 0.8–2 mm; bracteoles 0.5–0.8 mm long. Hypanthium campanulate or ellipsoid, 4–5 by 3.2– 3.5 mm, glabrous. Calyx lobes 7–9 by 0.7–0.9 mm. Corolla white or lavender, 28 –32 mm long, 6 –8 times longer than hypanthium, glabrous; tube decurved, 10–13 mm long; dorsal lobes 18– 22 by 0.8–1.2 mm; ventral lobes 16–17 by 1.8 –2.2 mm, connate for 2/3 or more their length. Filament tube densely short-pubescent; anther tube 1.4–1.6 mm diam, glabrous; dorsal anthers 4.7– 5.5 mm; ventral anthers 3.3 –4 mm, bearded at apex with white trichomes 1.5 –2.5 mm long.

Distribution — Endemic to Negros in the Philippines.

Habitat & Ecology — Evergreen rainforest and grassland, 1160–1200 m. Flowering and fruiting: March through June.

Additional specimens. PHILIPPINES, Negros, Negros Oriental, Sibulan, Kabalinan, L. Balinsasayao, Philippine Plant Inventory 929 (BRIT); Negros Occidental, Murcia, Brgy. Sta., Sta. Cruz, Mt Sirab, So Managaksak, Philippine Plant Inventory 14376 (BRIT).

Figures

Fig. 1 Flowers of Lobelia philippinensis Skottsb. a. subsp. philippinensis; b. subsp.negrosensis Lammers; c. subsp.biliranensis Lammers (a: Elmer 6066, NY; b: Philippine Plant Inventory 6380, BRIT; c: Sulit 5578, L).