Raddiella minima Judziewicz & Zuloaga (1991: 939)

Lopes-Neto, Raimundo Balieiro & Viana, Pedro Lage, 2022, Flora of the Serra do Cachimbo (Eastern Amazon, Brazil): Bambusoideae (Poaceae), including the description of two new species, Phytotaxa 550 (2), pp. 99-129 : 124

publication ID

https://doi.org/ 10.11646/phytotaxa.550.2.2

DOI

https://doi.org/10.5281/zenodo.6641159

persistent identifier

https://treatment.plazi.org/id/422A3803-4366-8D5C-FF7B-796BFE5D861B

treatment provided by

Plazi

scientific name

Raddiella minima Judziewicz & Zuloaga (1991: 939)
status

 

Raddiella minima Judziewicz & Zuloaga (1991: 939) View in CoL . Fig. 7 M–N View FIGURE 7 .

Type:— BRAZIL. Pará: Município de Itaituba , km 771 estrada Santarém-Cuiabá próximo a divisão Pará-Mato Grosso, mata de cerrado solo pedregoso, vegetação rupestre, 9°35’S, 54°35’W, 22 April 1983, Amaral 883 (holotype INPA!, isotypes MO, NY) GoogleMaps .

Rhizomes absent. Culms 3–6 cm long, filiform, geniculate, multi-branched, internodes ca. 5 mm, smooth, glabrous; nodes dark brown, with a few very short retrorse trichomes. Leaf sheaths ca. 2 mm, glabrous to short-pilose, the upper margins ciliate, fimbriae absent; ligules ca. 0.2 mm, membranous; pseudopetioles 0.1–0.2 mm long, glabrous to shortpilose; blades 4–6 × 2.7–3.3 mm, ovate-triangular, delicately membranous, glabrous, asymmetrical, base truncate, margins scaberulous, apex acute or apiculate. Terminal synflorescences ca. 10 mm long, with a single male spikelet. Axillary synflorescences ca. 3 mm long, female spikelets 2(–3). Male spikelets ca. 1.3 mm long, elliptical, hyaline, glabrous, the lemma soon caducous. Female spikelets 1–1.4 mm long, lanceolate-ovoid, glabrous to short-hispid, delicately membranous; lower glume 3-nerved, apex acuminate; upper glume 3-nerved, apex acuminate; anthecium 0.9–1.2 mm long, ovoid, white becoming dark, dorsally compressed, smooth and shiny, caducous. Caryopsis not seen.

Specimens examined: — BRAZIL. Pará : Itaituba, Estrada Santarém-Cuiabá, BR 163, Km 771, próximo a divisão Pará-MT, 22 April 1983, Amaral 883 ( INPA, MO) .

Additional specimens examined: — BRAZIL. Amazonas : Canutama, Joana D’Arc, 95m, 8°39’27”S, 64°21’39”W, 23 April 2007, Viana et al. 2634 ( INPA) GoogleMaps .

Distribution and habitat: —This species is endemic to Brazil, in the states of Amazonas, Mato Grosso and Pará ( Zuloaga & Judziewicz 1991, Oliveira & Oliveira 2020). In the Serra do Cachimbo, it was found in Campo rupestre near the borders of Mato Grosso and Pará States ( Zuloaga & Judziewicz 1991).

Comments: — Raddiella minima is one of the smallest bamboos of the world (Zuloaga & Judziewicz 1993, Judziewicz & Sepsenwol 2007), with filiform culms 3–6 cm long, ovate-triangular leaves, asymmetrical, glabrous, base truncate and apex acute to apiculate. It can be distinguished from R. esenbeckii by the shorter culms, blades 0.4–0.6 cm long, the axillary synflorescences bearing only female spikelets and ovoid-globose caryopsis, with the hilum punctiform, central.

INPA

Instituto Nacional de Pesquisas da Amazonia

MO

Missouri Botanical Garden

NY

William and Lynda Steere Herbarium of the New York Botanical Garden

Kingdom

Plantae

Phylum

Tracheophyta

Class

Liliopsida

Order

Poales

Family

Poaceae

Genus

Raddiella

Loc

Raddiella minima Judziewicz & Zuloaga (1991: 939)

Lopes-Neto, Raimundo Balieiro & Viana, Pedro Lage 2022
2022
Loc

Raddiella minima Judziewicz & Zuloaga (1991: 939)

Zuloaga, F. O. & Judziewicz, E. J. 1991: )
1991
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