Volume 14 > Part 1 > Year 2018 > Page 74 > Podostemaceae > Hanseniella

1. Hanseniella heterophylla C.Cussetwfo-0000715385

Bull. Mus. Hist. Nat. (Paris), B, Adansonia 14(1): 36. 1992; M.Kato, Acta Phytotax. Geobot. 55: 139. 2004; Werukamkul, Ampornpan, Koi & M.Kato, Acta Phytotax. Geobot. 63: 19. 2012; Werukamkul, Ampornpan, M.Kato & Koi, Acta Phytotax. Geobot. 67: 103. 2016. Fig. 2, Plate V: B, C.

Accepted Name : This is currently accepted.

Description : Root crustose, irregularly lobed, lobe usually 5–24 mm wide, with leaves in scattered tufts on dorsal surface of root. Leaves 2–7 per tuft, linear, terete, 1–4 mm long. Flowering shoots 2–6 mm long, erect or suberect. Bracts thick, dimorphic, arranged in 4 ranks (2 dorsal, 2 ventral), 3–6 per rank, upper ones gradually larger, bracts in adjacent ranks occasionally connate; ventral bracts (facing root) ovate or obovate,1–4 by 0.7–2 mm, bilobed 1/2 to base (occasionally 3-lobed), lobes obtuse or lower ones acute; dorsal bracts simple, uppermost ones bilaterally asymmetric, rectangular, subtruncate or round, 1–3 by 0.4–1.5 mm, lower ones symmetric, subacute, carinate abaxially. Flower 1, terminal; bud enveloped by spathella, the spathella thick, with 2 or 3 ridges, irregularly ruptured near apex; pedicel 0.5–2 mm long; tepals 2, one on each side of stamen, linear, 2–4.5 mm long; stamens 2, forked above middle, 3–8 mm long, longer than pistil; ovary-stalk 0.3–4 mm long; ovary 1, 2-locular, ellipsoid, slightly flattened, ca 2.5 by 1 mm, protruding from bracts at maturity; stigmas 2, forked near base, equal, curved or erect, 0.4–1.5 mm long, linear, pointed or obtuse; ovules 4–8 per locule, large (ca. 1 by 0.5 mm), born on upper and lower parts of septum interrupted by sterile middle part, sometime with additional ovules in upper central part. Capsule stalked (stalk 2–8 mm long), far exceeding bracts, ellipsoid, flattened, 1.1–2.5 mm long, ribs 8–16 (up to 8 additional shorter, thinner ribs between 8 thick ribs).

Thailand : NORTHERN: Phitsanulok ( type: Hansen 11569, holotype -C); NORTH-EASTERN: Loei.

Distribution : Endemic to Thailand.

Ecology : Growing at 25–500 m alt.