Dicoma hindana (Asteraceae), a new species from Somalia

Ortíz, S. & Oubiña, J.R. 1995. Dicoma hindana (Asteraceae), a new species from Somalia. - Nord. J. Bot. 15: 187–189. Copenhagen. ISSN 0107–055X.
A new species of the genus Dicoma (sect. Psilocoma ), from Somalia, is described. The characteristics by which it can be distinguished from related species are listed.     

New or noteworthy species of Leguminosae in NE tropical Africa

The following new species are described: Chamaecrista dunensis (Somalia), Acacia densispina (Somalia), A. flagellaris (Somalia), Tephrosia karkarensis (Somalia), T. scopulata (Somalia), Indigofera ancistrocarpa (Kenya), I. curvirostrata (Ethiopia), I. hiranensis (Somalia), I. karinensis (Somalia), I. kucharii (Somalia), I. nugalensis (Somalia), I. pellucida (Kenya, Somalia), I. sabulosa (Ethiopia, Somalia), I. sessilis (Somalia), I. ienuirostris (Somalia), Rhynchosia megalocalyx (Somalia), Crotalaria allophylla (Somalia), C. intricata (Somalia), C. warfae (Somalia), and Coronilla somalensis (Somalia). 2n = 22 is reported in Tephrosia karkarensis. Cassia somalensis, Acacia puccioniana, Sophora somalensis , and Crotalaria sennii are reduced to synonyms of respectively Senna hookeriana, Dichrostachys kirkii, Millettia usaramensis and Crotalaria boranica subsp. trichocarpa . Thirty-seven taxa are reported from Somalia for the first time, including Ptycholobium biflorum , known previously only from Southern Africa. Crotalaria pieropoda , known previously only from Socotra, is reported from Somalia and Oman. Neptunia oleracea and Vatovaea pseudolablab are new generic records for respectively Ethiopia and Oman. The fruits of Indigofera boranica are described. Vigna somaliensis and an allied species are discussed. Rhynchosia gansole is lectotypified and its flowers and fruits are described.     

Two new species of Jatropha (Euphorbiaceae) from Somalia

The new species Jatropha miskatensis , from limestone slopes of the Cal Miskaat Range in north-eastern Somalia, and J. marmorata , from bushland on shallow soil over limestone just south of the Nugaal valley in north-eastern Somalia, are described. An illustration is provided for J. miskatensis.     

Eight new species and a new record of Indigofera and Microcharis (Leguminosae-Indigofereae) from Somalia

The following new species are described: Indigofera bayensis (south-west Somalia, on sand or gravel in Acacia-Commiphora bushland), I. gypsacea (central and south-west Somalia, on gypsum), I. karkarensis (north-east Somalia, on limestone), I. lamellata (south-west Somalia, on and around granitic outcrops), I. lughensis (south-west Somalia, on gypsum), I. phymatodea (south-west Somalia, on granitic outcrops), I. scopiformis (central Somalia, on sand in Acacia-Commiphora bushland), and Microcharis nematophylla (central Somalia, on sand in Acacia-Commiphora bushland). Indigofera pseudointricata , previously known only from Socotra, is reported also from Somalia.     

Section of tropical taxonomy: Seven new species and one new record of Polygala (Polygalaceae) from Somalia

The following new species are described: Polygala gypsophila (northern, central and southern Somalia, on gypsum), P. bariensis (northern Somalia, on limestone), P. hamarensis (coastal dunes near Mogadishu), P. argentea (central Somalia, on limestone near coast), P. gawenensis (central Somalia, on limestone), P. effusa (central Somalia and eastern Ethiopia, on sand), P. citrina (southern Somalia, on granitic outcrops). P. meonantha is reported for the first time from Somalia.     

Digitaria brunoana (Gramineae), nuova specie della Somalia

Abstract

Digitaria brunoana (Gramineae), a new species from Somalia. - Digitaria brunoana, a new species occurring on the coastal sand dunes at Gesira near Mogadishu (Somalia), is described. This new taxon is related to D. longiflora which is distributed in the Tropical Africa.     

New species of Cucumis (Cucurbitaceae) from northeast tropical Africa

The new species Cucumis hastatus (widespread in southern Somalia, in deciduous bushlands), C. pubituberculatus (central Somalia, on open coastal dunes), C. Jeffrey-anus (southwestern Somalia and eastern Ethiopia, on alluvial soils), and C. baladensis (south-central Somalia, on fixed dunes), are described and illustrated. C. figarei is shown to be illegitimate, the correct name for the species apparently being C. pustulatus.     

Two new species of the genus Dicoma (Asteraceae) from Somalia

Two new species, Dicoma gillettii and Dicoma scoparia (Asteraceae), both from Somalia, are described and illustrated. The differences between the new species and related taxa are listed.     

Bauhinia leucantha sp. nov. (Leguminosae-Caesalpinioideae) and notes on B. ellenbeckii

Bauhinia leucantha sp. nov. is described from central Somalia. The new species is related particularly to B. ellenbeckii in Ethiopia and Somalia, B. teitensis in Kenya, and B. natalensis in eastern South Africa. B. somalensis is reduced to a synonym of B. ellenbeckii and the distribution of this species is shown to extend to northern Somalia.     

Indigofera rubromarginata sp. nov. (Leguminosae) from southern Arabia, with a note on I. eremophila

Thulin, M. 1995. Indigofera rubromarginata sp. nov. (Leguminosae) from southern Arabia, with a note on I. eremophila. — Nord. J. Bot. 15: 519–521. Copenhagen. ISSN 0107–055X.
The new species Indigofera rubromarginata , widespread along the coast of southern Arabia in Yemen and Oman, is described and illustrated. The closely related I. eremophila , previously known only from eastern Ethiopia and Somalia, is reported also from Yemen.     

A new species of Microcharis (Leguminosae) from Somalia

The new species Microcharis omissa , from the sandstone escarpment near Yasoomman in central Somalia, is described. This apparently narrow endemic is closely related to M. sessilis in north-eastem Somalia.     

A new species of Isoglossa (Acanthaceae) from NE tropical Africa

The first species of Isoglossa known from Somalia, I. congesta is described om material from central Somalia and SE Ethiopia. It is related to I. parvifolia Rendle, occurring in E Ethiopia, but differs in the contracted inflorescences and long calyx lobes with long glandular hairs.     

Justicia galeata and J. kuchari, two new species of Justicia (Acanthaceae) from tropical Africa

Jusricia galeara from SE Kenya and J. kuchari from central Somalia are described. The affinities of the new species are discussed and illustrations are provided.     

Two new species of Justicia sect. Ansellia (Acanthaceae) from E and NE tropical Africa

The new species Justicia ornatopila from Sudan, Ethiopia, Somalia, Uganda, Kenya and Tanzania, and J. lorata from Kenya are described and illustrated. Information on pollen morphology is also provided     

南亚和东南亚龙胆属(龙胆科)的新名称、新组合及分类注释

本文提出了龙胆属两个种的新名称(Gentiana membranulifera T．N．Ho,G．nudicaulisKurz var. assa- mensis T．N．Ho)和5个变种的新组合[(Gentiana lateriflora Hemsl．var. uncifolia(H．J．Lam)T．N．Ho, G．sumatrana Ridl．var．humifusa(S．Moore)T．N．Ho,G. quadrifaria Bl．var．wightii(Kusnez．)T．N．Ho, G．loerzingii Ridl. var．timida(Kerr)T．N．Ho,G．membranulifera T．N．Ho var．recurvata (Kusnez．)T．N．Ho)〕。     

Calliandra (Leguminosae) in continental Africa

The mainly neotropical genus Calliandra Benth. (Leguminosae–Mimosoideae–Ingeae) is reported for the first time as native in continental Africa. There are two species known, C. gilbertii Thulin & Hunde sp. nov. in E Kenya and Somalia and C. redacta (J. H. Ross) Thulin & Hunde comb. nov. in South Africa near the Namibia border. On pollen morphological grounds they are supposed to be most related to certain neotropical species but the pollen does not agree entirely with any previously known group of the genus. The distribution of C gilbertii and C. redacta stresses the phytogeographical link between the arid zones of northern and southern Africa.     

五种大戟属植物nrDNA的ITS序列分析及其叶的比较解剖学研究

运用PCR直接测序法和石蜡切片法,测定5种安徽产大戟属植物的nrDNA的内转录间隔区(ITS)序列包括5.8SrDNA及其叶片的解剖。结果表明(1)5种大戟属植物的ITS的长度范围为641~662bp,运用Maga软件构件ITS树把5种植物归为两大支大戟、月腺大戟与乳浆大戟聚为一支;地锦和斑地锦聚为另一支。结果表明地锦和斑地锦亲缘关系较近,而大戟、月腺大戟和乳浆大戟亲缘关系较近。(2)5种大戟属植物的叶片结构中,除地锦和斑地锦外,其余3种有明显的栅栏组织和海绵组织之分,但二者在叶肉中的厚度比在种间有一定的差别;而地锦和斑地锦叶的栅栏组织与海绵组织分化不明显,且皆有乳汁管,其他3种植物叶片内未见此结构,叶片结构分析表明大戟、月腺大戟和乳浆大戟叶片结构相近,而地锦草和斑地锦叶片结构也相近。(3)分析表明nrDNA的ITS序列及叶的比较解剖特征具有明显的相关性。以上研究结果为大戟属植物的分类和药用开发提供了实验证据。     

Water Relations and Low-Temperature Acclimation for Cactus Species Varying in Freezing Tolerance

Opuntia ficus-indica and Opuntia streptacantha are widely cultivated cacti that can tolerate temperatures no lower than -10[deg]C, whereas Opuntia humifusa, which is native to southern Canada and the eastern United States, can tolerate -24[deg]C. As day/night air temperatures were decreased from 30/20 to 10/0[deg]C, the osmotic pressure increased 0.10 MPa for O. ficus-indica and O. streptacantha but 0.38 MPa for O. humifusa. The increases in osmotic pressures were due mostly to the synthesis of fructose, glucose, and sucrose. In addition, O. humifusa produced a substantial amount of mannitol during exposure to low temperatures. Substantial accumulation of sugars and mannitol in cells of O. humifusa may help prevent intracellular freeze dehydration and ice formation as well as provide noncolligative protection to its membranes. Mucilage was slightly higher in all three species at the lower temperatures. Extracellular nucleation of ice occurred closer to the equilibrium freezing temperature for plants at 10/0[deg]C compared with 30/20[deg]C, which could make the cellular dehydration more gradual and, thus, less damaging. Results from nuclear magnetic resonance indicated a restricted mobility of intracellular water at the lower temperatures, especially for O. humifusa, which is consistent with its lower water content and higher levels of low molecular weight solutes.     

New names,new combinations and taxonomic notes of Gentiana (Gentianaceae) from South and Southeast Asia

The new names Gentiana membranulifera T. N. Ho and G. nudicaulisKurz var. assamensis T. N. Ho are proposed. The new combinations Gentiana lateriflora Hemsl. var. uncifolia (H. J. Lam) T. N. Ho, G. sumatrana Ridl.var. humifusa (S. Moore) T. N. Ho, G. quadrifaria Bl. var. wightii (Kusnez.)T. N. Ho, G. loerzingii Ridl. var. timida (Kerr) T. N. Ho, and G. membranulifera T. N. Ho var. recurvata (Kusnez.) T. N. Ho are made.     

Ten new species of Commiphora (Burseraceae) from Somalia

The following new species are described: Commiphora arenaria from bushland on sand in south-central Somalia, C. gardoensis from limestone slopes in the Qardho area in north-eastem Somalia, C. stellatopubescens from bushland on limestone outcrops or stony ground in the Hiiraan Region in south-central Somalia, C. spinulosa from limestone rocks on the escarpment along the Gulf of Aden in northeastern Somalia, C. lobatospathulata from bushland on sand in central and south-central Somalia, C. quercifoliola from bushland on shallow soil over limestone near Eil in north-eastem Somalia, C. chiovendana from bushland in northern and central Somalia, C. multifoliolata from limestone hills and ridges in south-westem Somalia, C. murraywatsonii from limestone outcrops near Hobyo in central Somalia, and C. kucharii from bushland on shallow soils over limestone in central and southern Somalia.