Edit History
XYRIS erosa Lock [family XYRIDACEAE]
Date Updated: 19 August 2007
Herbarium
Royal Botanic Gardens, Kew (K)
Collection
Flora of Tropical East Africa
Resource Type
Reference Sources
Entry From
Flora of Tropical East Africa, page 1, (1999) Author: J. M. Lock, M.A., Ph.D.
Names
XYRIS erosa Lock [family XYRIDACEAE], in K.B. 53: 885 (1998). Type: Tanzania, Mbeya District, Madibira, Anderson 1248 (EA!, holo., K!, iso.)
Information
Annual or short-lived perennial herb forming loose clumps. Leaves linear, up to 24 cm. long, 3 mm. wide; sheaths 2–2.5 cm. long, brown with broad membranous margins, rather abruptly narrowing distally; ligule short; lamina linear, flattened, glabrous, smooth; apex acute, weakly asymmetric, pale brown, solid. Peduncles up to 42 cm. long, ± 1.5 mm. in diameter, terete, minutely punctate, longitudinally grooved; peduncle-sheaths similar to the leaf-sheaths; apex with a tuft of blunt hairs which fall off easily; spike obovoid at maturity, up to 1.2 cm. long, 1 cm. in diameter towards the base; sterile bracts membranous, ovate, acute, whitish with a pale brown minutely papillose keel, 7.5 mm. long, 4 mm. wide; fertile bracts ovate, acute, 5 mm. long, 3 mm. wide, pale shining brown, keel papillose, darker brown with a narrowly elliptic pale central papillose mark ± 3 mm. long, 0.5 mm. wide, margins irregularly ciliate-dentate above. Lateral sepals arcuate, pale brown, strongly keeled, the keel regularly dentate along almost its whole length. Corolla, androecium and gynoecium not known. Seeds broadly ellipsoid, 0.4 mm. long, 0.3 mm. in diameter, with 10–12 longitudinal ridges.
Range
DISTR. T 7; known only from the type
Altitude range
± 1000 m.
Distribution
TANZANIA Mbeya District Madibira, 23 July 1959, Anderson 1248!
Notes
This specimen cannot be matched with any described taxon. The prominent central mark on the bracts recalls X. angularis, but that species has elongated seeds and a much smaller spike. There is too little material for dissection of flower structure.
Date Updated: 19 August 2007
Herbarium
Royal Botanic Gardens, Kew (K)
Collection
Flora of Tropical East Africa
Resource Type
Reference Sources
Entry From
Flora of Tropical East Africa, page 1, (1999) Author: J. M. Lock, M.A., Ph.D.
Names
XYRIS erosa Lock [family XYRIDACEAE], in K.B. 53: 885 (1998). Type: Tanzania, Mbeya District, Madibira, Anderson 1248 (EA!, holo., K!, iso.)
Information
Annual or short-lived perennial herb forming loose clumps. Leaves linear, up to 24 cm. long, 3 mm. wide; sheaths 2–2.5 cm. long, brown with broad membranous margins, rather abruptly narrowing distally; ligule short; lamina linear, flattened, glabrous, smooth; apex acute, weakly asymmetric, pale brown, solid. Peduncles up to 42 cm. long, ± 1.5 mm. in diameter, terete, minutely punctate, longitudinally grooved; peduncle-sheaths similar to the leaf-sheaths; apex with a tuft of blunt hairs which fall off easily; spike obovoid at maturity, up to 1.2 cm. long, 1 cm. in diameter towards the base; sterile bracts membranous, ovate, acute, whitish with a pale brown minutely papillose keel, 7.5 mm. long, 4 mm. wide; fertile bracts ovate, acute, 5 mm. long, 3 mm. wide, pale shining brown, keel papillose, darker brown with a narrowly elliptic pale central papillose mark ± 3 mm. long, 0.5 mm. wide, margins irregularly ciliate-dentate above. Lateral sepals arcuate, pale brown, strongly keeled, the keel regularly dentate along almost its whole length. Corolla, androecium and gynoecium not known. Seeds broadly ellipsoid, 0.4 mm. long, 0.3 mm. in diameter, with 10–12 longitudinal ridges.
Range
DISTR. T 7; known only from the type
Altitude range
± 1000 m.
Distribution
TANZANIA Mbeya District Madibira, 23 July 1959, Anderson 1248!
Notes
This specimen cannot be matched with any described taxon. The prominent central mark on the bracts recalls X. angularis, but that species has elongated seeds and a much smaller spike. There is too little material for dissection of flower structure.
Date Updated: 19 August 2007
Herbarium
Royal Botanic Gardens, Kew (K)
Collection
Flora of Tropical East Africa
Resource Type
Reference Sources
Entry From
Flora of Tropical East Africa, page 1, (1999) Author: J. M. Lock, M.A., Ph.D.
Names
XYRIS erosa Lock [family XYRIDACEAE], in K.B. 53: 885 (1998). Type: Tanzania, Mbeya District, Madibira, Anderson 1248 (EA!, holo., K!, iso.)
Information
Annual or short-lived perennial herb forming loose clumps. Leaves linear, up to 24 cm. long, 3 mm. wide; sheaths 2–2.5 cm. long, brown with broad membranous margins, rather abruptly narrowing distally; ligule short; lamina linear, flattened, glabrous, smooth; apex acute, weakly asymmetric, pale brown, solid. Peduncles up to 42 cm. long, ± 1.5 mm. in diameter, terete, minutely punctate, longitudinally grooved; peduncle-sheaths similar to the leaf-sheaths; apex with a tuft of blunt hairs which fall off easily; spike obovoid at maturity, up to 1.2 cm. long, 1 cm. in diameter towards the base; sterile bracts membranous, ovate, acute, whitish with a pale brown minutely papillose keel, 7.5 mm. long, 4 mm. wide; fertile bracts ovate, acute, 5 mm. long, 3 mm. wide, pale shining brown, keel papillose, darker brown with a narrowly elliptic pale central papillose mark ± 3 mm. long, 0.5 mm. wide, margins irregularly ciliate-dentate above. Lateral sepals arcuate, pale brown, strongly keeled, the keel regularly dentate along almost its whole length. Corolla, androecium and gynoecium not known. Seeds broadly ellipsoid, 0.4 mm. long, 0.3 mm. in diameter, with 10–12 longitudinal ridges.
Range
DISTR. T 7; known only from the type
Altitude range
± 1000 m.
Distribution
TANZANIA Mbeya District Madibira, 23 July 1959, Anderson 1248!
Notes
This specimen cannot be matched with any described taxon. The prominent central mark on the bracts recalls X. angularis, but that species has elongated seeds and a much smaller spike. There is too little material for dissection of flower structure.
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