Xylopia beananensis Cavaco & Keraudren

Johnson, David M. & Murray, Nancy A., 2020, A revision of Xylopia L. (Annonaceae): the species of Madagascar and the Mascarene islands, Adansonia sér. 3 42 (1), pp. 1-88: 20-22

publication ID

http://doi.org/ 10.5252/adansonia2020v42a1

persistent identifier

http://treatment.plazi.org/id/417D87A4-FFE8-FFFB-FF08-554C3221F84F

treatment provided by

Tatiana

scientific name

Xylopia beananensis Cavaco & Keraudren
status

 

2. Xylopia beananensis Cavaco & Keraudren  ( Figs 1GView FIG; 8J-PView FIG)

Bulletin de la Société botanique de France 103: 275 (1956). — Type: Madagascar. Prov. Toamasina [“ Domaine de l’Est ”], bassin de la Rantabe, environs de Beanana, 650 m, 25.II.1954 (fl., fr.), Capuron 9077 (holo-, P [ P030365 ]!; iso-, P[P030366, P030367, P00697844]!; TEF, photo!; WAG!).  

MATERIAL EXAMINED. — Madagascar. Prov. Antananarivo. Centre, forêt d’Ambotantely, sur le Tampoketsa d’Ankazobe, 1600 m, 27.II.1966 (fl.), Capuron 24569 SF (K n.v., P[P01954040, P01954041, P01954042]);  3.0 km NW of Ambohitsaratelo-Bebao ( NW of Tsiroanomandidy ), 1100-1200 m, 16.I.1985 (fr.), Dorr et al. 3588 ( BR, G, MO, NY, P[P01954044, P01954045], US, WAG)  .

Prov. Antsiranana. Réserve naturelle intégrale de Tsaratanana, slopes W of River Antsahamanara, Fir. Marolana, Fiv. Ambanja, 14°02’06”S, 48°47’08”E, 1408 m, 28.XI.2000 (buds), Antilahimena et al. 667 ( OWU, P[P02034675]);  Diana Region , Anketrabe-Belinta , Ambilobe , Beramanja, Camp Bilahy, 13°35’09”S, 48°43’34”E, 963 m, 22.II.2005 (fl.), Buerki et al. 14 ( MO)GoogleMaps  ; Ambilobe , Beramanja, Anketrabe, forêt de Kalabenono, 13°38’31”S, 48°40’25”E, 700 m, 25.XI.2006 (fr.), Callmander et al. 598 (K n.v., P[P01954043])GoogleMaps  ; East (Nord), environs sud de Tsaratanana, entre Nosiarina et Antsirabe-Nord (route Sambava-Vohémar), 1.IV.1967 (fl.), Capuron 27657 SF (P[P01954055, P01954056, P01954057, P01954058])  ; SW of Andapa, near SW edge of Anjanaharibé-Sud Reserve , 14°48’15”E, 49°26’45”E, 1000-1100 m, 6.VIII.1997 (fr.), McPherson 17267 (K n. v., MO, WAG)  ; Sava Region , Sava , Andapa , Anjialavabe, Ankiakabe, forêt dense humide de moyenne altitude d’Antsahaberaoka, située à 11 km au NW d’Anjialavabe, 14°09’53”S, 49°22’52”E, 1002 m, 24.II.2007 (fr.), Rakotovao et al. 3717 ( MO)GoogleMaps  ; Marotolana à 7 km est de Beangona-Ambevy, 14°01’54”S, 48°47’01”E, 700-1300 m, 26.XI.2000 (fl.), Ratovoson et al. 342 (P[P01954032])GoogleMaps  .

Prov. Fianarantsoa. Fianarantsoa, Iakora, Begogo, Bekora, forêt de Sahalava au S de village du Androizaha, 23°32’26”S, 46°32’00”E, 1260 m, 29.I.2005 (fr.), Andrianjafy et al. 800 (MO). 

Prov. Mahajanga. Sous-Préfecture de Befandriana-Nord, commune rurale de Matsoandakana, Quartier de Belalona, Sud-Ouest d’Andapa, Réserve Spéciale Anjanaharibe-Sud, village d’Anjiamazava, suivant la route Nationale d’Andapa-Bealanana, piste vers Nord approchant le sommet de Bevitsika, 14°42’S, 49°27’E, 1100 m, 14.XII.1994 (fr.), Ravelonarivo & Rabesonina 569 (OWU, P[P01954033]). 

Prov. Toamasina. Alaotra Mangoro, Moramanga, Ambatovola, Fanovana, forêt de Vohimana, 18°55’13”S, 48°30’49”E, s. d. (fr.), Andriatsiferana 2590 (K n.v., MO, P[P00909316]);  Alaotra-Mangoro Region, Fivondronana Moramanga, Commune Andasibe , Fokontany Beravo , Ambatovy forest , 18°48’28”S, 48°18’43”E, 1100 m, 26.I.2005 (fr.), Antilahimena et al. 3247 (K n.v., MO, P[P01954034])GoogleMaps  ; Alaotra-Mangoro Region, Fivondronana Moramanga, Commune Andasibe , Fokontany Beravo , Ambatovy forest , near Berano village , 18°50’17”S, 48°19’42”E, 1025 m, 11.II.2005 (fr.), Antilahimena et al. 3377 (K n.v., MO, P[P01954031])GoogleMaps  ; Moramanga, Andasibe, Menlamba , near Behontsa village , Ambatovy forest , 18°51’59”S, 48°19’09”E, 1045 m, 8.III.2005 (fr.), Antilahimena et al. 3623 (K n. v., P[P01954035])GoogleMaps  ; Toamasina, Moramanga, Commune Ambohibary, Fokontany Ampitambe , 18°51’02”S, 48°17’24”E, 1080 m, 9.II.2007 (fr.), Antilahimena & Edmond 5244 (P[P06901360])GoogleMaps  ; au-dessus d’Andratambe , alt. 500 m, bassin inférieur de la Vohilava, affluent rive gauche de la Rantabe, III.1954 (large buds, fr.), Capuron 9159 ( OWU, P[P01757050, P01954037, P01954038])  ; Alaotra-Mangoro Region, District Moramanga, Commune Ambohibary , Fokontany Ampitambe , Ambatovy , NE de Moramanga, environ 22 km de Moramanga , 18°51’31”S, 48°19’03”E, 1121 m, 19.II.2005 (fr.), Rakotovao et al. 1232 ( MO)GoogleMaps  ; Alaotra-Mangoro Region, Analamay, Ambatovy , Fokontany Ampitambe , Firaisina Ambohibary , Fivondronana Moramanga , 18°50’52”S, 48°18’31”E, 1148 m, 10.II.2005 (fr.), Razafindraibe & Antilahimena 101 ( OWU)GoogleMaps  ; Alaotra-Mangoro Region, Torotorofotsy forest, Fokontany Ampitambe , Ambatovy , commune rurale Ambohibary , district Moramanga , 18°51’48”S, 48°20’33”E, 958 m, 13.I.2005 (fr.), Razanatsoa 27 (K)GoogleMaps  ; forêt Tsiazonomby, Dist. Moramanga, Canton Anosibe , 26.VI.1952 (old fls, fr.), Service Forestier (Stanislas) 6123 SF (P[P01954049, P01954050 (fruit), P01954051])  ; Antetezampandrana, Toby Comexfo P. K. 45 route Moramanga-Anosibe, District Moramanga , Canton Moramanga , 23.I.1969 (buds), Service Forestier 26848 SF (P[P01954039])  .

DISTRIBUTION, ECOLOGY AND CONSERVATION STATUS. — Xylopia beananensis  occurs in humid lowland to lower montane forests of northern, central, and southern Madagascar at elevations from 500 to 1600 meters ( Fig. 28View FIG). Specimens with enlarging buds have been collected in January, March, and August, with open flowers in February, April, and November, and with floral remnants in June. Specimens with mature fruits have been collected from November to March and with immature fruits in August. We have given this species a preliminary conservation assessment of Data Deficient, but its large EOO, at 192 983 km 2 the largest for any Madagascar Xylopia  species ( Table 2), suggests that it is not of immediate conservation concern.

LOCAL NAMES. — Hazoambo (Antilahimena et al. 337, Razafindraibe & Antilahimena 101), rotry (Ravelonarivo & Rabesonina 569).

DESCRIPTION

Tree up to 30 m tall; d.b.h. up to 42 cm.

Twigs finely appressed-pubescent, the hairs 0.1-0.2 mm long, becoming glabrate; nodes with one axillary branch.

Leaves with larger blades 6.5-10.8 cm long, 2.5-4.8 cm wide, coriaceous, discolorous, olive-green and shining adaxially, tan to rusty abaxially, broadly lanceolate, oblong-lanceolate, elliptic, or rarely obovate, apex acute to acuminate, the acumen 5-15 mm long, base broadly cuneate and short-decurrent on petiole, margins somewhat revolute, glabrous adaxially, sparsely appressed-pubescent to glabrous abaxially; midrib red toward the base adaxially, secondary veins weakly brochidodromous, 10-14 per side, diverging at 45-70° from midrib, these and higher-order veins slightly raised and forming a conspicuous reticulum on both surfaces; petiole 3.5-8 mm long, flattened, winged along margins, longitudinally wrinkled, glabrous.

Inflorescences axillary or from the axils of fallen leaves, 1-4-flowered, pedunculate or not, pubescent; peduncle 1.1-2 mm long or absent; pedicels 2-4 per peduncle or arising separately from leaf axil, often recurved, 5.3-7.6(- 11) mm long, 1.0- 1.3 mm thick; bracts 2-4, spaced evenly along pedicel, caducous, only scars seen; buds lanceolate, apex obtuse.

Sepals wide-spreading at anthesis, ¹⁄5-1/2-connate, 2.7-3 mm long, 2.8-4.7 mm wide, coriaceous, semicircular, apex rounded or occasionally apiculate, pubescent abaxially.

Petals white to dull yellow, with the inner petals tinted red at the base in vivo; outer petals slightly spreading at anthesis, 17-18 mm long, 4-5 mm wide at base, 2.5-3 mm wide at midpoint, fleshy, lanceolate, keeled only at tip adaxially, with a faint keel abaxially, apex obtuse, densely puberulent except for the glabrous base adaxially, appressed-pubescent abaxially; inner petals slightly spreading at anthesis, 13.5-16.9 mm long, 3.5-3.9 mm wide at base, c. 1.2 mm wide at midpoint, fleshy, linear, keeled on both surfaces, apex acute, base concave with undifferentiated margins, densely puberulent except for the glabrous base on both surfaces.

Stamens 150-200; fertile stamens c. 1.5 mm long, narrowly oblong, anther connective apex c. 0.2 mm long, shield-shaped, slightly overhanging anther thecae, papillate, anthers 11-12-locellate, filament 0.5-0.6 mm long; outer staminodes 1.4-1.5 mm long, clavate, apex rounded; inner staminodes c. 1.1 mm long, oblong, apex truncate; staminal cone 2.8-3.2 mm diameter, 1.3-1.4 mm high, completely concealing the ovaries, rim irregularly laciniate.

Carpels c. 15; ovaries c. 0.7 mm long, ovoid, densely rusty appressed-pubescent, stigmas connivent, c. 3.3 mm long, filiform, glabrous.

Fruit of up to 15 monocarps borne on a pedicel 12-20 mm long, 2.5-3.5 mm thick, sparsely pubescent; torus 6.5-10 mm in diameter, 4-6 mm high, depressed-globose; monocarps with bright pink-red to red exterior and red endocarp in vivo, 2.4-4.8 cm long, 0.7-1.1 cm wide, 0.7-0.8 cm thick, narrowly oblong, often slightly torulose, apex obtuse, sometimes with a beak 2-5 mm long, base sessile, obliquely wrinkled, sparsely pubescent to glabrate; pericarp 0.6-2 mm thick.

Seeds up to 5 per monocarp, in a single row, oblique to parallel to long axis, 7.1-8.3 mm long, 3.7-5.2 mm wide, 3.5-4.5 mm thick, oblong-ellipsoid, circular to broadly elliptic in cross-section, brownish black to black, smooth or slightly pitted and wrinkled, shiny, perichalazal ring inconspicuous to slightly raised; sarcotesta absent; aril white in vivo, whitish orange when dried, bilobed, lobes 1.2-3.0 mm long, 3.1-4.7 mm wide, papery to fleshy, with ruffled margins.

NOTES

Xylopia beananensis  is distinguished by its coriaceous broadly lanceolate to elliptic leaves with a prominent vein reticulum on both surfaces, the well-developed staminal cone, and the strongly wrinkled and narrowly oblong monocarps with seeds lying nearly parallel to the long axis. It is most similar to X. flexuosa  , but differs in the flattened petioles, shorter pedicels with caducous bracts, and shorter petals. One collection (Antilahimena et al. 3377) reports the bark to be white. Precocious growth from the axillary vegetative bud superposed above inflorescences is an odd feature of some specimens.

At the time of the floristic treatment of Cavaco & Keraudren (1958) this species was only known from the basin of the Rantabe River in what is now northern Toamasina Province, but more recent collections show that it occurs up to 1600 meters from Antsiranana Province in the north south to Fianarantsoa Province. It is one of several relatively widespread mid-elevation Xylopia  species on the island, including X. lemurica  and X. perrieri  , which do not occur below 400 meters.

Of all species of sect. Xylopia  from the region, X. beananensis  bears the closest resemblance, in habit, foliage, flowers, and fruits, to X. aethiopica  , the single species of the section that occurs in Africa.

BR

Embrapa Agrobiology Diazothrophic Microbial Culture Collection

MO

Missouri Botanical Garden

NY

William and Lynda Steere Herbarium of the New York Botanical Garden

US

University of Stellenbosch

WAG

Wageningen University

OWU

Jason Swallen Herbarium

Kingdom

Plantae

Phylum

Tracheophyta

Class

Magnoliopsida

Order

Magnoliales

Family

Annonaceae

Genus

Xylopia

Loc

Xylopia beananensis Cavaco & Keraudren

Johnson, David M. & Murray, Nancy A. 2020
2020
Loc

Xylopia beananensis

Xylopia beananensis Cavaco & Keraudren ( Figs 1G ; 8J-P ) Bulletin de la Société botanique de France 103: 275 (1956). — Type: Madagascar . Prov. Toamasina [“ Domaine de l’Est ”], bassin de la Rantabe, environs de Beanana, 650 m, 25.II.1954 (fl., fr.), Capuron 9077 (holo-, P [ P030365 ]!; iso-, P[P030366, P030367, P00697844]!; TEF, photo!; WAG!).