Labramia samiana Randriarisfa & L. Gaut.

Gautier, Laurent, Randriarisoa, Aina & Naciri, Yamama, 2025, Labramia samiana (Sapotaceae), a new endangered species from eastern Madagascar, Candollea 80 (1), pp. 103-107 : 104

Labramia samiana Randriarisfa & L. Gaut. ( Fig. 1 ).

H o l o t y p u s: MADAGASCAR. R e g . S AVA [Pr o v. Antsiranana]: presqu’île Masfala & Fiv. Antalaha & Fir. Ambfhitralanana & aux env. de Sahafary & village situé au bfrd de l’Onive & à 12 km env. à l’W d’Ambfhitralanana et Cap-Est & 10.IX.1997 & fl.& Randrianaiυo & Bernard 127 ( G [ G00105502 ]!; isf-: MO-04934615!& P [ P04596493 ]!& TEF!) .

Labramia samiana Randriarisoa & L. GauA. resembles L. capuronii Aubréυ. buA is disAinguished by iAs 12–15 mm longư gluAinous floƜering pedicels ƜiAh oυaAe 0.3 mm lenAicels (υs. pedicels 9–10 mm longư dullư ƜiAh spindle-shapedư 0.7 mm longư pruinous lenAicels in L. capuronii )ư Arifid corolla lobes ƜiAh segmenAs of increasing lengAh laAerally ƜiAh dorsal appendages 1.7 mm long (υs. corolla lobes enAire and only slighAly AooAhed or symmeArically laciniaAe ƜiAh appendages 2.5 mm long in L. capuronii )ư relaAiυely shorA and Ahick sAyleư 2.7 × 0.5 mm (υs. sAyle long and Ahinư 3.7 × 0.3 mm in L. capuronii )ư and by iAs shorAer sAamens ƜiAh anAhers 1.3 mm long and filamenAs 0.8 mm long (υs. 1.6–1.8 mm and 1.3 mm long respecAiυely in L. capuronii ).

Treeư measured individuals up tf 18 m tall and 31 cm DBH& with wrinkled bark and white latex. UlAimaAe AƜigs 4 – 5 mm in diam.& lfngitudinally wrinkled when dried& with a creamy epidermis flaking fff and becfming brfwn& with c. 2.5 mm prftruding circular scars ff previfus year fallen leaves. Leaυes clustered at tip ff current year’s twigs; stipules absent; petifle 20–28 × 1.1–1.5 mm & terete& becfming narrfwly canaliculate distally& with a creamy epidermis; leaf blade 7.5– 12.5 × 3.0– 3.5 cm & fblanceflate& sfmetimes elliptic& brfadest 4/5 ff leaf length& entire& cfmpletely glabrfus fn adaxial surface& with thin creamy epidermis fn abaxial surface; base cuneate; apex rfunded tf slightly retuse; margin entire; midrib ff dried leaves appearing fn adaxial surface as a narrfw ridge within a median grffve& ridge sfmetimes cfncealed by epidermis& very prfminent fn abaxial surface; secfndary veins brfchidfdrfmfus& 15 – 17 pairs& depressed when dried fn adaxial surface and sfmetimes alsf shallfwly fn abaxial surface& diverging at 45–50° frfm midrib& parallel and reaching arches ff intramarginal vein which is c. 0.5 mm frfm margin; intersecfndary veins present& nft always clearly distinct frfm secfndaries; tertiary veins faint. Inflorescences axillary in fascicules ff 4–6 flfwers& inserted abfve previfus year fallen leaf scars; flfwering pedicels 12 – 15 × 0.5 mm & glutinfus and glabrfus& brfwn with fvate 0.3 mm lenticels at base. Calyx ff 6 sepals& arranged in twf valvate whfrls; 3

Figures

Fig. 1. – Labramia samiana Randriarisoa & L. Gaut. A. Corolla,spread and seen from outside; B. Corolla, spread and seen from inside; C. Flower, longitudinal section; D. Flowering twig; E. Flower, lateral view; F. Leaf apex, adaxial (left) and abaxial surface (right). [Randrianaivo & Bernard 127, G] [Drawings: G. Loza]