Skip to main content
This species is accepted, and its native range is SE. & S. Brazil.

[KBu]

De Brito, A. (2007). A Taxonomic Revision of the Genus Phymatidium (Orchidaceae: Oncidiinae). Kew Bulletin, 62(4), 529-560. Retrieved from http://www.jstor.org/stable/20443388

Morphology General Habit
Plant up to c. 20 mm tall, forming small to dense and intricate clumps
Morphology Leaves
Leaves up to c. 26 x 1 mm, several, falcate, coriaceous, variable in cross-section, subterete, green
Morphology Reproductive morphology Flowers
Flowers usually resupinate, white with a green centre, with spreading segments or usually not opening widely, with sepals and petals curved forwards
Morphology Reproductive morphology Flowers Calyx
Lateral sepals 2 - 2.5 x 0.5 mm, spreading or somewhat porrect and curved upwards, linear, narrowly ovate to ovate-lanceolate, falcate, usually slightly concave towards the apex, acute, abaxially weakly carinate Dorsal sepal 2 - 3 x 0.3 - 1 mm, linear, narrowly ovate to oblong lanceolate, slightly hooded, acute, abaxially weakly carinate
Morphology Reproductive morphology Flowers Column
Column 1 - 2.5 mm long (excluding the tabula infrastigmatica), strongly incurved, slightly to distinctly sigmoid, sulcate underneath, weakly to distinctly recurved near the apex, auriculate, the auricles somewhat semicircular to broadly ovate when spread, running from near the base up to the apex of the column, glabrous or inconspicuously papillose, the margins of the auricles entire, slightly sinuose to inconspicuously erose; stigmatic cavity small, ovate, placed at base of the column; rostellum very short to somewhat conspicuous, usually somewhat porrect and curved forwards; tabula infrastigmatica c. 1 - 1.6 x 1 - 1.6 mm, thick, swollen, somewhat obovate-trapeziform in outline from above, laterally sulcate, usually with a longitudinal obscurely raised ligulate or obovoid callus at the middle; anther c. 1.5 mm long, operculate, ovate-panduriform in outline, somewhat incurved towards the apex, usually with a hint of a tooth at each side near the apex, which is shortly recurved and emarginate; pollinia arranged in two superposed unequal pairs, the superior pair clavate, the inferior obovoid; stipe c. 1 mm long, cuneiform, base curved forward, the apex bifurcate or subtruncate and obscurely 3 lobed; viscidium very small, broadly elliptic, concave
Morphology Reproductive morphology Flowers Corolla
Petals 2.2 - 5 x 0.6 - 1.5 mm, spreading, ovate, narrowly ovate to ovate-lanceolate, rarely linear, weakly carinate abaxially, acute to obtuse and very shortly apiculate Lip 2 - 5 x 1.5 - 3.5 mm, usually broadly unguiculate with a cordiform blade, rarely somewhat rhombic, slightly obtuse to acute, usually acuminate; margins usually weakly erose at the middle of the lip up to near the apex, entire towards the base; base provided with a glandular, concave, ligulate callus which is rounded at apex and equals or slightly exceeds the length of the claw of the lip
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary c. 0.5 - 1 mm long, obscurely angled
Morphology Reproductive morphology Flowers Pedicel
Pedicel 2 - 4.5 mm long, slightly twisted, angled, shortly papillose on the angles
Morphology Reproductive morphology Fruits
Capsule 3.5 - 5 x 3 - 5 mm, globose, obscurely carinate, the pedicel c. 2.5 mm long (P. microphyllum var. herteri).
Morphology Reproductive morphology Inflorescences
Inflorescences few to several, up to c. 90 mm long, 2- to 10-flowered, racemose, occasionally producing flowering plantlets; peduncle up to c. 45 mm long, slightly flexuous, angular in cross-section, finely papillose on the angles, covered by several widely spaced, narrowly ovate to linear sterile bracts, up to 8 x 0.5 mm, acute; rachis up to 45 mm long, zig-zag; floral bracts similar to the sterile ones, decreasing slightly in size towards the apex of inflorescence
Morphology Roots
Roots several, terete, flexuous, thickish, papillose or glabrous
Morphology Stem
Stem inconspicuous
Note
The specific epithet derives from the Greek mikros, small, and phyllon, a leaf, and refers to the small size of the leaves. Phymatidium microphyllum was first described in the genus Ornithocephallus by Barbosa Rodrigues in the first volume of his Genera et Species Orchidacearum Novarum published in 1877. In the second volume published in 1882, he mistakenly treated this species as conspecific with P. delicatulum. All subsequent authors have apparently followed Barbosa Rodrigues and thus a transfer of this species to the genus Phymatidium has only been recently made (Toscano de Brito 2001). P. microphyllum is indeed closely related to P. delicatulum, from which it differs mainly in the shape of the column, especially the shape of the broader and longer auricles which are usually glabrous or rarely obscurely papillose. Like Phymatidium delicatulum, P. microphyllum is quite a variable species and has some extreme variants which seem to be more or less reproductively isolated from the others. These are here recognised as P. microphyllum var. microphyllum and P. microphyllum var. herteri.
Type
Brazil, Minas Gerais, Caldas, Barbosa Rodrigues s.n. (Lost). Lectotype designated by Toscano de Brito (2001): Barbosa Rodrigues' original illustration which appeared in his Iconographie des orchidées du Brésil, vol. 6, plate 314, fig. B (Library of Rio Botanical Garden!), reproduced in Sprunger et al. (1996: 442).

Native to:

Brazil South, Brazil Southeast

Phymatidium microphyllum (Barb.Rodr.) Toscano appears in other Kew resources:

First published in Lindleyana 16: 211 (2001)

Accepted by

  • Govaerts, R. (2003). World Checklist of Monocotyledons Database in ACCESS: 1-71827. The Board of Trustees of the Royal Botanic Gardens, Kew.
  • Royer, C.A., Toscano de Brito, A.L.V. & de Camargo Smidt, E. (2014). O gênero Phymatidium (Orchidaceae: Oncidiinae) no estado do Paraná Rodriguésia; Revista do Instituto de Biologia Vegetal, Jardim Botânico e Estaçao Biologica do Itatiaya 65: 251-260.
  • Toscano de Brito, A.L.V. (2007). A taxonomic revision of the genus Phymatidium (Orchidaceae: Oncidiinae) Kew Bulletin 62: 529-560.

Literature

Kew Bulletin

  • Barbosa Rodrigues, J. (1877). Genera et Species Orchidearum Novarum, Vol. 1. C. & H. Fleiuss, Rio de Janeiro.
  • Cogniaux, A. (1904 - 1906). Orchidaceae. In: C. F. P. Martius, A. G. Eichler & I. Urban, Flora Brasiliensis, Vol. 3, Part 6. Munich & Leipzig.
  • Toscano de Brito, A. L. V. (2001). Systematic review of the Ornithocephalus Group (Oncidiinaer, Orchidaceae) with comments on Hofmeisterella. Lindleyana 16: 157 - 217.

Kew Backbone Distributions

  • Royer, C.A., Toscano de Brito, A.L.V. & de Camargo Smidt, E. (2014). O gênero Phymatidium (Orchidaceae: Oncidiinae) no estado do Paraná Rodriguésia; Revista do Instituto de Biologia Vegetal, Jardim Botânico e Estaçao Biologica do Itatiaya 65: 251-260.

Kew Backbone Distributions
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

Kew Bulletin
Kew Bulletin
http://creativecommons.org/licenses/by-nc-sa/3.0

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0