A New Species of the Athyriaceae from Hong Kong:
Diplazium taimoshanensis Ng et al., stat. nova
Ng et al., 23rd Nov., 2005
Link: Chinese monographic for this topic; Herbarium Ngensis (Chinese base); Home (Chinese base)
Tai Mo Shan, Athyriaceae, Diplazium, Diplazium serratifolium Ching, Diplazium taimoshanensis Ng et al. stat. nova, Diplazium doniamum (Mett.) Tard.-Blot and Diplazium maonense Ching.
Key to Genus Diplazium
(incl. D. taimoshanensis, D serratifolium)
All of about 30 species of Diplazium are well known in the world (using Ching's system of classification ) and only 4 species found in Hong Kong.
1. Lamina single, tapering to either end, margin entire
Classification and Botanical Morphology
Rhizome: black, short-creeping, with few scales, with a mass thick root, 5cm depth underground, hard and woody. Stipes: about 18 ~ 35cm long, spaced on the rhizome, few black scales in the base, black. about 0.1~0.3cm dia., Scales with tooth margin, less than 0.5 cm long. Lamina: texture thick papery or coriaceous, simply pinnate, 18~30cm long by 20cm wide, with 1~2 pairs of lateral pinnae and a simple terminal pinna, pinnae lanceolate, with falcate apex. Terminal pinna is slightly longer than lateral, opposite at lower pairs. attachments petiolate. Pinnae: margins undulate or serrate at the middle and lower, and almost regular serrations or toothed at the mature age. Serrate crest measures 0.05cm and 0.2 cm max. Veins: oblique and forked, free, each branch grouped with 3 (or 4) single veins. Sori, dark-yellowish, along the basal veins, elongate, at the middle between the mid-rib and margin, with elongate indusium. length differ.
Species proxime affinis Diplazium donianum (Mett.) Tard.-Blot, a qua differt statu multo majore, marginibus serraturis majoribus preaditis, pinnis paucioribus, tenuribus, utroque sensim angustatis.
Planta 75cm alta. Rhizomate repente, paleis rhizomatis nigris, ovata-lanceolatis, marginibus inciso-serratis. Stipite ad 18~35cm longo, ca. 0.1~0.3 cm diametro, basi stipitis paleis fuscis. Pagina frondis textura chartacea, lamina oblonga, 18~30cm longa, 20cm lata, pinnara cum pinna impair terminali lateralibus simili, 1-2-jugis, magnitudine similibus, utroque sensim angustatis, apice longe acuminates. Pinnis margine serratis. Venis trifurcates, Soris lineribus, plerumque diplazioideis, indusiis linearibus.
Illustrations: 1. the whole plant, 2. Rhizome with stipes, 3.Part of fertile frond, 4. Mid-lower part of a pinna, 5. scale, (drawn refer series of typus and isotypus specimen: NSF-F36808, A, B, C)
Tai Mo Shan, Hong Kong, locally quite rare and only few spots were found in the single point from the secondary forest, at altitude 780m circa, under the shelter from giant rocks, It is associated several species of Bambusa and other ferns such as: Vittaria flexuosa Fee, Asplenium austrochinense Ching, etc. Other rare species, the very rare orchid species to Hong Kong, Anoectochilus yungianus S.Y. Hu, also been found at the same place.
Cognitio Sapiens Ngensis (), code name for our researching projects, both social and natural science, we organize an expedition team for investigation into the flora of Hong Kong, it will pay to be assiduous and honest to this job. It differs greatly from others, we don't need spend more money which from the foundations, but only traffic disbursement, foods and walks. we need the truth, instead of those of honor that carries no privilege.
Pteridology of Hong Kong is the most glamorous for us because more works still should be needed. We do believe that there are still exists of many hidden ferns species in Hong Kong. But,
How and when can we find them?
We volunteered for this hard and unprofitable job and try to do our best to solve the problem.
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