A new species in the tree genus Polyceratocarpus (Annonaceae) from the Udzungwa Mountains of Tanzania

TY - JOUR

T1 - A new species in the tree genus Polyceratocarpus (Annonaceae) from the Udzungwa Mountains of Tanzania

AU - Marshall, Andrew R.

AU - Couvreur, Thomas L P

AU - Summers, Abigail L.

AU - Deere, Nicolas J.

AU - Luke, W. R Quentin

AU - Ndangalasi, Henry J.

AU - Sparrow, Sue

AU - Johnson, David M.

N1 - © Andrew R. Marshall et al.

PY - 2016/6/1

Y1 - 2016/6/1

N2 - Polyceratocarpus askhambryan-iringae, an endemic tree species of Annonaceae from the Udzungwa Mountains of Tanzania, is described and illustrated. The new species is identified as a member of the genus Polyceratocarpus by the combination of staminate and bisexual flowers, axillary inflorescences, subequal outer and inner petals, and multi-seeded monocarps with pitted seeds. From Polyceratocarpus scheffleri, with which it has previously been confused, it differs in the longer pedicels, smaller and thinner petals, shorter bracts, and by generally smaller, less curved monocarps that have a clear stipe and usually have fewer seeds. Because Polyceratocarpus askhambryan-iringae has a restricted extent of occurrence, area of occupancy, and ongoing degradation of its forest habitat, we recommend classification of it as Endangered (EN) on the IUCN Red List.

AB - Polyceratocarpus askhambryan-iringae, an endemic tree species of Annonaceae from the Udzungwa Mountains of Tanzania, is described and illustrated. The new species is identified as a member of the genus Polyceratocarpus by the combination of staminate and bisexual flowers, axillary inflorescences, subequal outer and inner petals, and multi-seeded monocarps with pitted seeds. From Polyceratocarpus scheffleri, with which it has previously been confused, it differs in the longer pedicels, smaller and thinner petals, shorter bracts, and by generally smaller, less curved monocarps that have a clear stipe and usually have fewer seeds. Because Polyceratocarpus askhambryan-iringae has a restricted extent of occurrence, area of occupancy, and ongoing degradation of its forest habitat, we recommend classification of it as Endangered (EN) on the IUCN Red List.

KW - East Africa

KW - Eastern arc

KW - Endemism

KW - Ndundulu

KW - Polyceratocarpus

UR - http://www.scopus.com/inward/record.url?scp=85010866459&partnerID=8YFLogxK

U2 - 10.3897/phytokeys.63.6262

DO - 10.3897/phytokeys.63.6262

M3 - Article

AN - SCOPUS:85010866459

SN - 1314-2011

VL - 63

SP - 63

EP - 76

JO - PhytoKeys

JF - PhytoKeys

IS - 1

ER -