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9. Crenias A. Sprengel

Crenias A. Sprengel in K. P. J. Sprengel, Syst. Veg. 4 (2) Curae postoriores: 246 (1827); van Royen, Acta Bot. Neerl. 3: 224--228 (1954), rev. (under Mniopsis); Philbrick & Novelo, Syst. Bot. Monographs 70: 1­--106 (2004), rev. (under Podostemum).

Mniopsis Mart. (1823 or 1824), nom. illeg.

Roots thread-like and usually laterally flattened, branching; stems arising from lateral margins of root, usually in opposite or subopposite pairs, simple or branched, usually with leaf remains below and a tuft of leaves at the tip. Leaves entire or a few times forked, with 1 stipule on front side of dorsiventral shoot, attached to or detached from associated leaf, the 2 dorsal rows of stipules accompanying the 2 lateral leaf rows. Spathellas bell- or club-shaped, up to 3 mm long, splitting irregularly from top. Flowers few to numerous; pedicels hardly exceeding spathella; tepals 2 or 3, one each side of andropodium and one, when present, between or below filaments; stamens 2, borne on andropodium; anthers dehiscing introrsely; pollen in dyads. Capsules globose to ellipsoidal, smooth, 2-locular, valves unequal, the larger persistent, the sutures oblique; stigmas equal, covered with hair-like papillae, usually palmately branched,.one species (Crenias glazioviana) with simple stigmas. About five spp., SE Brazil. Phylogenetic analyses (Philbrick and Novelo 2004) place this genus within Podostemum.


Subfam. Podostemoideae

Crenias weddelliana. A Fragment of creeping root with two subopposite shoots (1 cm). B Stigmas (0.5 mm). C Flower (1 mm).

Cook & Rutishauser 2007

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