A newly adoptet restriction of illegitimity in generic names and its consequences forAvenochloa Holub 1962

Holub, Josef

doi:10.1007/bf02909476

Cited by 5 publications

(4 citation statements)

References 13 publications

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“…In the species of Helictotrichon parlatorei group (RÖSER, 1989), together with certain endemic atypical species from Atlas Range (Avena Jahandiezii Litard. and A. brevia ristata Barratte, included by HOLUB, 1962, 1976 in Avenula), synaptorpermy occurs, occasionally accompanied by the reduction of spikelets to two fertile florets, but there is no clear upward differentiation as in Pseudarrhenatherum.…”

Section: Arrhenatherum Vs Pseudarrhenatherummentioning

confidence: 99%

Helictochloa Romero Zarco (Poaceae), a New Genus of Oat Grass

Romero-Zarco¹

2011

Candollea

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ROMERO-ZARCO, C. (2011). Helictochloa Romero Zarco (Poaceae), a new genus of oat grass. Candollea 66: 87-103. In English, English and French abstracts. Morphological and anatomical characters used to separate the genera related to Avena L. (Poaceae: Aveneae) are analyzed. The taxonomic importance of these characters is discussed with regard to recent molecular studies. Six genera of perennial oats are recognized: Arrhenatherum P. Beauv., Pseudarrhenatherum Rouy, Helictotrichon Besser, Avenula (Dumort.) Dumort., Tricholemma (Röser) Röser and Helictochloa Romero Zarco (described here) is accepted. New combinations for the species included in Helictochloa are proposed. A key to Avena related genera from the Mediterranean region is given.

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Section: Arrhenatherum Vs Pseudarrhenatherummentioning

confidence: 99%

Helictochloa Romero Zarco (Poaceae), a New Genus of Oat Grass

Romero-Zarco¹

2011

Candollea

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“…The name Avena pubescens includes many accepted synonyms and intraspecific taxa (Boissier, 1884;Holub, 1976;Valdés & Scholz, 2006;POWO, 2022;WFO, 2022), and the morphological variability of this species has long caused taxonomic confusion. Röser (1995: 398) designated a neotype for the name Avena pubescens, from a specimen collected at Hudson's locality: "England, West Sussex, between Sutton and Reigate, SW above Banstead Downs, Bromus erectus grassland at the margin of a golf course, 26 Jun 1994, Roser 10206 (WU)" with several duplicate specimens at B, BC, BM, C, G, GOET, K, M, MA, LZ, P, PR, S, SEV, TUB, W, and the personal collection of the author (Martin Röser).…”

Section: Introductionmentioning

confidence: 99%

Effective typification of Avena pubescens (Poaceae; Pooideae)

Ferrer‐Gallego¹

2022

Mediterr. Bot.

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Avena pubescens Hudson was previously considered to have been “neotypified” by Röser in 1995 from a specimen preserved at WU herbarium (Wien). However, there is an original element that was included and cited in the protologue. Therefore, the typification by Röser is here briefly discussed and superseded because is being contrary to Art. 9.8 of the International code of nomenclature for algae, fungi, and plants (Shenzhen Code). The name is lectotypified in this paper with an illustration published by Ray in 1724. In addition, for a precise circumscription of the name, an epitype is proposed from a complete and well preserved specimen at WU.

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“…Due to its comparatively short and straight, non‐geniculate awn, Avena breviaristata was often accommodated under a separate, monospecific section (sect. Brevitrichon Holub; Holub, , , ).…”

Section: Introductionmentioning

confidence: 99%

Recovery of the type specimen ofAvena breviaristata, an endemic Algerian grass species collected only once (1882): Morphology, taxonomy and botanical history

Gabriel

Tkach

Röser

2020

TAXON

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Avena breviaristata, collected only once (1882) in Algeria and never re-collected since, is a very mysterious grass species because unfortunately even the type specimen got lost 60-80 years ago. Morphological information on this species was thus based on a few published descriptions, which made it difficult, however, to correctly infer the genus affiliation of this morphologically odd species. Avena breviaristata became affiliated in the past with various oat-like genera (Avenula, Helictotrichon, Tricholemma). Due to the recent rediscovery of the type specimen at the P herbarium and the opportunity to study this specimen, we report here on the morphological characters of A. breviaristata, underpinned by meaningful illustrations. They are discussed in comparison with the morphology of representative species of the above-mentioned genera. Uncommon characters of the spikelets (type of disarticulation of the rachilla, lemma structure, lodicules) and to some extent of the inflorescences, leaves and leaf sheaths support the inclusion of A. breviaristata in the North African genus Tricholemma. Considering biogeography, T. breviaristatum from the arid Hauts Plateaux in Algeria is a highly xeromorphic counterpart of the mesomorphic species T. jahandiezii, which is confined to higher altitudes of the rather humid Moyen Atlas in Morocco. This underlines the status of Tricholemma as a relic endemic. Our morphological survey supports the classification of Avenula (only A. pubescens) as separate from Helictotrichon s.str. and Helictochloa. Moreover, morphological evidence does not support an origin of A. pubescens by intergeneric hybridization between the latter genera as hypothesized in some prior studies. Especially the glabrous palea, the special shape of the lodicules and the structure of the awn show no intermediacy. The complicated history of the type collection of T. breviaristatum and the role of botanical authors are given.

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A newly adoptet restriction of illegitimity in generic names and its consequences forAvenochloa Holub 1962

Cited by 5 publications

References 13 publications

Helictochloa Romero Zarco (Poaceae), a New Genus of Oat Grass

Helictochloa Romero Zarco (Poaceae), a New Genus of Oat Grass

Effective typification of Avena pubescens (Poaceae; Pooideae)

Recovery of the type specimen ofAvena breviaristata, an endemic Algerian grass species collected only once (1882): Morphology, taxonomy and botanical history

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