Aspidostemon fungiforme, Werff, 2006

Werff, Henk Van Der, 2006, A revision of the Malagasy endemic genus Aspidostemon Rohwer & Richter (Lauraceae), Adansonia (3) 28 (1), pp. 7-44 : 21-22

publication ID

https://doi.org/10.5281/zenodo.5186799

persistent identifier

https://treatment.plazi.org/id/03AE87F6-5D58-FFC8-1516-70C2FD9AFCD6

treatment provided by

Carolina

scientific name

Aspidostemon fungiforme
status

 

8. Aspidostemon fungiforme  

Van der Werff, sp. nov. ( Figs 2C View FIG ; 4D View FIG )

A congeneris staminibus   sex, floribus fungiformibus inflorescentiis puberulis recedit.

TYPUS. — Madagascar. Antsiranana, disturbed vegetation, c. 1.5 km   W of Cap Est , 15°16’S, 50°27’E, 35 m, 24. GoogleMaps   I.1999, fl., Schatz , Lowry, Rabenantoandro & Bernard 3804 (holo-,   MO; iso-, P, TEF).

PARATYPES. — Madagascar. Falaises maritimes au Nord de la Fananehana, [15°53’S, 49°42’E], bud, Service Forestier 18226 ( MO, P) GoogleMaps   . — Ivontaka , au S de Mananara, [16°17’S, 49°49’E], fl., Service Forestier 22833 ( MO, P, TEF) GoogleMaps   . — Masoala Peninsula , near Ambizana, coastal trail, [15°38’S, 49°58’E], fl., Van der Werff et al. 12765 ( BR, CAS, G, HBG, K, L, LE, MO, P, PRE, TAN, TI, US) GoogleMaps   .

DESCRIPTION

Trees, to 15 m. Twigs terete, glabrous, lenticellate; terminal buds appressed pubescent. Leaves opposite, 5.5-12 × 1.8-4 cm, glabrous, elliptic, chartaceous, the base acute, the apex acuminate, acumen to 6 mm long, blunt or the acumen not fully expanded, the margin flat, reticulation immersed on the upper surface, weakly raised on lower surface, lateral veins difficult to discern, petioles c. 5 mm long, canaliculate. Inflorescences c. 1.5 cm long, sparsely to moderately appressed pubescent; pedicels 3-5 mm long. Flowers cream, 3-4 mm in diam., 1-1.5 mm long, mushroom-shaped, with a slender pedicel and a flat cap, the tepals reduced to short, broad lobes; stamens 6, the tips flat, very wide, touching each other and forming a ring outside the staminodia III, locelli apical, staminodia 3 with greatly expanded tips, forming a shield-like structure in the center of the flower, fused or tightly pressed against each other; staminodia IV not seen; receptacle shallow, glabrous inside. Fruits not known.

REMARKS

Aspidostemon fungiforme   is characterized by the combination of 6 stamens with apical locelli, staminodia III with greatly expanded tips, forming a shield in the center of the flower, pubescent terminal buds and sparsely or moderately pubescent inflorescences. The type collection has less densely pubescent inflorescences than the other collections and there is also some variation in leaf size and texture. However, the similarities seem to outweigh the differences. One collection, Van der Werff et al. 12765, has many galled flowers, which appear globose, 4 mm or more in diameter, with a small crown of tepals, often somewhat asymmetrical. A few normal flowers with the typical mushroom shape, 6 stamens, enlarged staminodia III and pubescent terminal buds allow identification. Occasionally a flower with 8 tepals and 8 stamens is found ( Fig. 2C View FIG ). This species is only known from the NE coastal areas ( Fig. 5 View FIG ). Vernacular names have not been recorded.

ALTITUDINAL DISTRIBUTION

10-50 m.

PHENOLOGY

Flowers: October, November, January.

W

Naturhistorisches Museum Wien

I

"Alexandru Ioan Cuza" University

MO

Missouri Botanical Garden

P

Museum National d' Histoire Naturelle, Paris (MNHN) - Vascular Plants

S

Department of Botany, Swedish Museum of Natural History

TEF

Centre National de la Recherche Appliquée au Developement Rural

BR

Embrapa Agrobiology Diazothrophic Microbial Culture Collection

CAS

California Academy of Sciences

G

Conservatoire et Jardin botaniques de la Ville de Genève

HBG

Hiroshima Botanical Garden

K

Royal Botanic Gardens

L

Nationaal Herbarium Nederland, Leiden University branch

LE

Servico de Microbiologia e Imunologia

PRE

South African National Biodiversity Institute (SANBI)

TAN

Parc de Tsimbazaza

TI

Herbarium of the Department of Botany, University of Tokyo

US

University of Stellenbosch