Trischidium alternum (Benth.) H.E.Ireland

Ireland, H. (2007). Taxonomic Changes in the South American Genus Bocoa (Leguminosae-Swartzieae): Reinstatement of the Name Trischidium, and a Synopsis of Both Genera. Kew Bulletin, 62(2), 333-349. Retrieved from http://www.jstor.org/stable/20443359

Type

Brazil, Barra do Rio Negro, Riedel s.n. (holotype K!; isotypes A!, G!, P).

Morphology General Habit

Shrub or tree, rarely a liana, 1.5 - 10 m tall, flowering and fruiting with the leaves

Morphology Trunk

DBH 5 - 15 cm

Morphology Stem

Young branchlets shortly pubescent, glabrescent; older branchlets glabrous

Morphology Leaves

Leaf rachis 36 - 145 mm long, shortly pubescent, not channelled above; petiole 4 17 mm long; leaflets (1 -)3 - 9, elliptic to ovate, sometimes narrowly so or lanceolate, tapered towards the apex, glabrous with a short pubescence on the midvein above, glabrous beneath, terminal leaflet largest, 75 - 195 mm long, 30 - 75 mm wide, lateral leaflets 12 - 133 mm long, 9 - 62 mm wide; petiolule 2 - 2.5 mm long, 1 mm wide, pubescent to glabrescent

Morphology Reproductive morphology Inflorescences

Inflorescence axillary, in clusters, sometimes on short brachyblasts, generally a raceme but occasionally branched at the base, 7 - 55 mm long, the axis finely pubescent; floral bract c. 1 mm long, deltoid, persistent in fruit; pedicel 6 - 9 mm long, slender, pubescent to sparsely so

Morphology Reproductive morphology Flowers

Flower fragrant; calyx splitting to the base at anthesis into 3 rarely 4 segments, c. 5 mm long, tightly recurved, glabrous internally and externally, persistent in fruit; petal white to pale yellow, blade 3 - 7 mm long, 2.5 - 5 mm wide, claw 2 - 5 mm long, the specimens from Brazil with no distinction between claw and blade and the apex slightly hooded; stamens 12 - 16, anthers 2.5 - 5.5 mm long, filaments 4- 4.5 mm long; ovary and immature fruit glabrous or densely pubescent; style 4 - 8 mm long, sometimes persistent in fruit, usually caducous

Morphology Reproductive morphology Fruits

Fruit body 13 - 21 mm long excluding remnants of the style, 13 - 19 mm wide, 9 - 11 mm broad, glabrous; stipe 0.5 - 2 mm long

Morphology Reproductive morphology Seeds

Seed ellipsoid, red or orange, fading to dark brownish black when dry, 8 - 11 mm long, 5.5 -.7 mm wide, 5 - 6 mm deep.

Distribution

Peru, Guyana, northern Bolivia, Brazil (Amazonas, Pará).

Ecology

Moist, dense forest; 50 - 800 m alt.

Vernacular

Jacamin (Brazil; Amazonas); Ywyrapyta (Brazil; Amazonas, Pará); Sacha barbasco (Peru); Wichiboyeru (Guyana).

Phenology

Flowering time: July to Jan.

Note

This species is generally a tree or shrub, but one specimen from Pará (Balée 2517) is described as a liana. It is variable in leaflet number, shape and indumentum, and fruit size and indumentum. Moreover, specimens from Peru have petals with a distinct blade and claw, the blade being flat and elliptic, whereas those from Brazil have obovate petals with a cuneate base, a slightly hooded apex, and little or no distinction between the blade and claw. No other morphological characters, however, were found to support this split. The leaflets are alternately arranged.

Extinction risk predictions for the world's flowering plants to support their conservation (2024). Bachman, S.P., Brown, M.J.M., Leão, T.C.C., Lughadha, E.N., Walker, B.E. https://nph.onlinelibrary.wiley.com/doi/full/10.1111/nph.19592

Conservation

Predicted extinction risk: not threatened. Confidence: confident

International Legume Database and Information Service

Conservation

Not Threatened

Morphology General Habit

Perennial, Not climbing, Shrub/Tree

Bernal, R., Gradstein, S.R. & Celis, M. (eds.). 2015. Catálogo de plantas y líquenes de Colombia. Instituto de Ciencias Naturales, Universidad Nacional de Colombia, Bogotá. http://catalogoplantasdecolombia.unal.edu.co

Distribution

Nativa en Colombia; Alt. 250 - 250 m.; Guayana y Serranía de La Macarena.

Morphology General Habit

Árbol

Conservation

No Evaluada