Lincy, JosephSoosairaj, SebastinDhivya, RajappaArulanandam, John Peter...
7页
查看更多>>摘要：Psydrax cudalorensis sp.nov. is described and illustrated from Tamil Nadu, India based on morphological and molecular evidence. Although morphologically P. cudalorensis appears to be similar to P. dicoccos, it is different from P. dicoccos in various aspects such as presence of pubescent stem, leaf, peduncle, pedicel, calyx, corolla, fruit and apiculate anther. ITS, rbcL and matK based phylogenetic analysis and SEM study of leaf surface also help to distinguish both the species.
查看更多>>摘要：Two binomials, Panus bambusinus, and P. roseus, which were not validly published, are validated here. Morphological and molecular phylogenetic evidence support the new generic placement of the two species. New combinations are proposed to validate the binomials Panus bambusinus, and P. roseus.
查看更多>>摘要：Ischaemum dioecum, a new strange species from Northern Western Ghats, Maharashtra, India is described and illustrated. The most spectacular and unusual feature of the species is its dioecious breeding system i.e. male and female plants are sexually separate entities, which is being documented first time in the tribe Andropogoneae. Other distinguishing features are such as: sessile spikelets 1-flowered (only upper floret developed), palea bi-dentate with an arista from the sinus and pedicelled spikelet reduced or absent; stamens four with unusually filiform and elongated filaments, ca. 15 mm long; peduncle of male plants glandular and with tubercle-based bristles; style and stigma extraordinarily long each may be up to 14 mm long and pedicel 1/2-4/5 of the sessile spikelet. A table of morphological comparison and detailed discussion with allied species from Africa, India and Australia is given along with the keys to close genera. A detailed discussion on the similar case of dioecism in grasses; habitat characteristics, distribution of the populations and inter-specific interaction, adaptation and morphological affinities of I. dioecum is discussed with African, Indian and Australian taxa. It is apparently a narrow endemic species. Based on IUCN Red List Categories and Criteria, the species is assessed here as Critically Endangered (CR).
查看更多>>摘要：Dryopteris sukungiana, a new tetraploid fern species of Dryopteridaceae in Yunnan, Southwest China, is described and illustrated. Morphologically, D. sukungiana belongs to the D. sparsa complex but is unique in spreading blackish brown scales on the stipe, glandular hairs and small fibrillose scales on the abaxial surface of the lamina. Phylogenetic analyses show that D. sukungiana is of hybrid origin; its paternal parent is the Sino-Himalayan D. sparsa, and its maternal parent might be an undetected diploid species closely related to the Sino-Japanese D. sparsa.
查看更多>>摘要：A morphological and molecular study was carried out on two species of Carex from the former genus Uncinia from mainland South America and Juan Fernandez Islands: C. firmula (Kuk) J.R. Starr and C. subsacculata (G.A.Wheeler & Goetgh.) J.R.Starr. Both species share the particular character of having articulated pistillate scales that leave behind on the spike rachis a saccate stipe-like appendage after falling. We detected within C. firmula morphological differences between mainland South American specimens and Juan Fernandez specimens, mainly regarding flower density and utricle size. On the contrary, the molecular analysis showed no molecular differentiation between the two groups of populations. Whereas, strong molecular and morphological support were found for C. subsacculata. As such, we recommend that the populations of C. firmula found on Juan Fernandez and those found in the mainland should be recognised as different subspecies: island Carex firmula subsp. firmula and mainland C. firmula subsp. tenuis (Poepp. ex Kunth) R.Ridley & Jim.-Mejias. We discuss that the morphological differences may be a result of isolation in an oceanic island environment and have effect on seed dispersal. Taxonomic descriptions, images of diagnostic characters and a key are included.
查看更多>>摘要：Crotalaria rosenii (Pax) Milne-Redh. ex Polhill, an endemic species of the mountains of Ethiopia, is reported for the first time as an ornamental species. This taxon has been identified as C. agatiflora Schweinf. since 1952 in Colombia and 1982 in Ecuador, countries where it is continuously cultivated in parks, gardens and even in rural environments, which increases the propagule pressure and promotes a naturalization of this species. Crotalaria rosenii is easily recognized by the presence of bracteoles 1.0-1.2 x 0.2-0.3 cm, standard 5.0-5.5 x 4.0-4.6 cm, with the callosities glabrous, keel 5.8-6.0 cm length, with apex hooked, and ovoid slightly compressed seeds. I present a key to distinguish these two taxa, and comments related to the possible naturalization, distribution, and ecology of C. rosenii and C. agatiflora.
NSTL
Magnolia Press