Banisteriopsis schwannioides (Griseb.) B.Gates

Authority

Gates, Bronwen. 1982. Banisteriopsis, Diplopterys (Malpighiaceae). Fl. Neotrop. Monogr. 30: 1-238. (Published by NYBG Press)

Family

Malpighiaceae

Scientific Name

Banisteriopsis schwannioides (Griseb.) B.Gates

Type

Type. Spruce 1012, Brazil, Para, near Santarem, fl (lectotype, K; isolectotype, K). Grisebach s original description was based on two collections, a fruiting collection, Gardner 1484, and a flowering collection, Spruce 1012. I choose the Spruce sheet as lectotype because the description of the flowers is derived from this collection, the description of the leaves accords well with this plant, and the

Synonyms

Banisteria schwannioides Griseb.

Description

Species Description - Liana, the branches terete, minutely velutinous, the bark brown with scattered prominulous lenticels. Stipules minute or absent. Leaves with the petiole 3-7 mm long, velutinous, eglandular, the lamina 2.2-8.3 cm long, 1.2-4.8 cm wide, reduced in the inflorescence, ovate to orbicular, cordate to truncate at the base, apiculate to acuminate at the apex, with the margin revolute, bearing abaxially a pair of sessile glands 0.2-0.6 mm in diameter beside the costa at the base and sometimes 1-2(-5) pairs of minute stipitate glands, 0.1 mm in diameter, near the margin, softly velutinous to glabrate adaxially, velutinous abaxially, with the reticulation impressed adaxially and prominent abaxially. Inflorescence of 4-6-flowered umbels or short racemes borne in cymes on terminal or axillary branches, velutinous; bracts and bracteoles 1.2-2.0 mm long, lanceolate, velutinous abaxially, glabrous adaxially, caducous in flower or just after flowering; pedicels sessile or stipitate, 11-24 mm long, 0.6-0.8 mm wide, 0.6 mm without the hairs, minutely velutinous. Sepals broadly elliptic to ovate, rounded and sometimes revolute at the apex, tomentose abaxially, tomentose throughout adaxially, 3.0-5.0 mm long, 2.5-2.8 mm wide, the glands 2.0-3.0 mm long, 0.6-1.2 mm wide, the sepals projecting 1.8-2.0 mm beyond the glands, reflexed in fruit. Petals pink, dentate, the 4 lateral petals reflexed between the sepals, the claw 1.2-2.5 mm long, 0.4-0.8 mm wide, the limb 8.0-11.0 mm long, 6.0-9.5 mm wide, rotund, eglandular, the antero-lateral petals cochleate, the posterior petal with the claw erect, 3.5 mm long, 0.8-1.0 mm wide, apically constricted, rarely sericeous adaxially, the limb 6.0-6.5 mm long, 3.5-6.0 mm wide, rotund to obovate, the basal teeth gland-tipped. Stamens with the filaments 0.5-1.6 mm long, connate basally, the locules glabrous, 0.5-1.6 mm long, those of the stamens opposite the anterolateral sepals 0.6-0.8 mm long, the connectives of the 5 anterior stamens 1.0-1.8 mm long, 0.8-1.1 mm wide, 0.5-1.5 mm deep, glandular and very enlarged, those opposite the antero-lateral sepals projecting 0.6-1.0 mm beyond the locules, those of the 5 posterior stamens 0.3-0.7 mm long, 0.3-0.6 mm wide, 0.1-0.4 mm deep, not glandular. Ovary 1.0-1.4 mm tall, white-sericeous, the anterior style 2.6-3.0 mm long, 0.6-0.9 mm wide, thick and straight, the posterior styles 1.5-1.8 mm long, up to 0.5 mm wide and lyrate basally, tapering apically, the stigmas capitate. Samara with the carpophore up to 2 mm long, 1.8-2.0 mm wide, the nut 7-8 mm tall, 4-5 mm long, tuberculate to alulate, often asymmetric, appressed-pubescent, the distal margin prolonged into a tooth basally, the wing 27-30 mm long, 11-13 mm wide, appressed-sericeous to glabrate, the hairs T-shaped, sessile or stipitate, the trabecula straight and stiff, 0.6-1.2 mm long, the wings of the 2 posterior samaras somewhat rotated to lie parallel to the wing of the anterior samara. epithet "schwannioides" seems more fitting for a taxon with a greatly enlarged anterior style. The description of the fruits is based on the Gardner sheet, which is a galled individual of B. malifolia var. appressa.

Discussion

Collected in flower in July to October, and in fruit August to October.

Distribution

Collected in the forests of Amazônas and Pará in Brazil, alt. 0-200 m.

Brazil South America| Amazonas Brazil South America| Pará Brazil South America|