TY  - GEN
A1  - Block, Petra de
T1  - Revision of the Madagascan endemic Homollea (Rubiaceae - Pavetteae), with description of two new species
T2  - European journal of taxonomy : 423
N2  - Homollea Arènes (Rubiaceae, subfamily Ixoroideae, tribe Pavetteae) is a genus of shrubs and small trees endemic to western and northern Madagascar. The genus comprises five species occurring in dry deciduous forest, often in limestone areas. The five species are narrow endemics and their conservation status is either Endangered (4 species) or Critically Endangered (1 species). Homollea is characterized by few-flowered, pseudo-axillary, pedunculate inflorescences, well-developed calyces with the lobes much longer than the tube, laterally flattened seeds with a shallow, elongated to linear hilum and entire endosperm, ovules arising from the upper margin of the placenta, and, pollen grains with supratectal elements in the shape of microgemmae. Until now, three species were known and their descriptions are amended. Two further species, H. furtiva De Block sp. nov. and H. septentrionalis De Block sp. nov., are described as new for science. The five species are dealt with in detail: descriptions, distribution maps, conservation assessments, illustrations, lists of exsiccatae and an identification key are given.
T3  - European journal of taxonomy  : EJT - 423 
KW  - identification key
KW  - Madagascar
KW  - new species
KW  - pyrene morphology
KW  - taxonomy
Y1  - 2018
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/46272
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-462720
SN  - 2118-9773
PB  - Muséum National d'Histoire Naturelle
CY  - Paris
ER  -