Tachia smithii

Content

Description

Small tree or shrub, up to 4 m high, branched. Branches 0.3-0.6 cm in diam., terete, not winged; internodes 4.5-9 cm long. Leaves petiolate, arranged along stem; petiole 0.8-1.4 cm long; blade membranaceous, elliptic, 10.3-18.1 x 3.2-7.2 cm, margin flat, apex acute to suddenly acuminate, base attenuate. Flowers solitary or in pairs; calyx yellowish green to green, 17-25 x 6 mm, lobes ovate, 6-11 x 3-5 mm, margin membranaceous, apex acute; corolla white or light green, funnel-shaped, 65-73 mm long, 10-19 mm wide at mouth, lobes ovate, 9-17 x 8-11 mm, apex acuminate, with darker tip; stamens not extending beyond corolla lobes, filaments 35-57 mm long, strongly bent towards apex, anthers white, elliptic, 3-4 mm long, bent after anthesis; pollen exine unknown; pistil ca. 58 mm long, ovary 8 mm long, style 50 mm long, stigma lobe elliptic, 4-5 x 4-5 mm. Fruit unknown.

Distribution

Akarai Mts. at the Guyanan-Brazilian border: present Guyana, Republic of: present
Known only from the Akarai Mts. at the Guyanan-Brazilian border; 2 collections studied, of which 1 from Guyana (GU: 1).

Phenology

Flowering specimens collected in .

Notes

This species is morphologically very close to T. grandiflora and is here only tentatively accepted until more material can be studied. The main difference is the more narrow corolla in T. smithii.

Synonymy

Tachia smithii Maguire & Weaver in J. Arnold Arbor. 56: 117. 1975 sec. JEANETTE ALLOGIO, LAURA COBB, JASON R. GRANT & al., 2012
    • Isotype: Brazil, Pará, Akarai Mts., drainage of Rio Mapuera (Trombetas tributary), A.C. Smith 2931 (AAU).
    • Isotype: Brazil, Pará, Akarai Mts., drainage of Rio Mapuera (Trombetas tributary), A.C. Smith 2931 (F).
    • Isotype: Brazil, Pará, Akarai Mts., drainage of Rio Mapuera (Trombetas tributary), A.C. Smith 2931 (K).
    • Isotype: Brazil, Pará, Akarai Mts., drainage of Rio Mapuera (Trombetas tributary), A.C. Smith 2931 (L).
    • Isotype: Brazil, Pará, Akarai Mts., drainage of Rio Mapuera (Trombetas tributary), A.C. Smith 2931 (MO).
    • Isotype: Brazil, Pará, Akarai Mts., drainage of Rio Mapuera (Trombetas tributary), A.C. Smith 2931 (S).
    • Isotype: Brazil, Pará, Akarai Mts., drainage of Rio Mapuera (Trombetas tributary), A.C. Smith 2931 (US).
    • Isotype: Brazil, Pará, Akarai Mts., drainage of Rio Mapuera (Trombetas tributary), A.C. Smith 2931.
    • Holotype: Brazil, Pará, Akarai Mts., drainage of Rio Mapuera (Trombetas tributary), A.C. Smith 2931.

Images

Specimens

CountryDateCollector + collecting numberHerbariaTypeScanDerivatives
A.C. Smith 2931F, S, L, K, AAU, MO, US
Citation: Brazil, Pará, Akarai Mts., drainage of Rio Mapuera (Trombetas tributary), A.C. Smith 2931.

Specimen summary: AAU
Isotype of Tachia smithii Maguire & Weaver

Specimen summary: Brazil, Pará, Akarai Mts., drainage of Rio Mapuera (Trombetas tributary), A.C. Smith 2931.
Isotype of Tachia smithii Maguire & Weaver
Holotype of Tachia smithii Maguire & Weaver

Specimen summary: F
Isotype of Tachia smithii Maguire & Weaver

Specimen summary: K
Isotype of Tachia smithii Maguire & Weaver

Specimen summary: L
Isotype of Tachia smithii Maguire & Weaver

Specimen summary: MO
Isotype of Tachia smithii Maguire & Weaver

Specimen summary: S
Isotype of Tachia smithii Maguire & Weaver

Specimen summary: US
Isotype of Tachia smithii Maguire & Weaver

Guyana, Republic ofHenkel et al. 4914L, US
Citation: Guyana, Republic of, U. Takutu- U. Essequibo Region, Akarai Mts., Kashinar Mt., summit and surrounding slopes, Henkel et al. 4914.

Specimen summary: L

Specimen summary: US