Key to species of the <i>Pteronia adenocarpa</i> group 1. Cypselae glabrous-glossy, g... more Key to species of the <i>Pteronia adenocarpa</i> group 1. Cypselae glabrous-glossy, glandular and/or hairy, when hairy then hairs evenly distributed on the surface.................................................................................................................................................................................................. <b>remaining species of <i>Pteronia</i></b> - Cypselae hairy, hairs strictly confined to the base.............................................................................................................................2 2. Branches glabrous..............................................................................................................................................................................3 - Branches hairy..........................................................................................................................................................................
FIGURE 1. Species of the Pteronia adenocarpa group. A. P. adenocarpa fruit showing hairs strictly... more FIGURE 1. Species of the Pteronia adenocarpa group. A. P. adenocarpa fruit showing hairs strictly confined to the base; B. Habit of P. adenocarpa; C. Portion of P. adenocarpa pappus showing tortuous band near the base; D. Portion of P. armatifolia leaves showing cluster of bristles on the apex; E. Habit of P. elongata; F. P. stoehelinoides leaves showing hairs on abaxial surface of midrib; G. P. viscosa showing greyish-white branches and viscous involucral bracts. Vouchers: A & C. Goldblatt & Porter 12190, NBG; D. Burgoyne 10731, PRE; Source: B, E–G. iNaturalist.org. Photograph–A, C, D: AO Bello: B: Gigilaidler; E: Karooicus; F: Nicky; G: Knysna_wildflowers. Scales: A & C = 2 mm, D = 0.5 mm.
Epidermal features of ten Nigerian species of Solanum were studied, in order to find useful taxon... more Epidermal features of ten Nigerian species of Solanum were studied, in order to find useful taxonomic characters. Fresh leaf material was collected and treated by conventional anatomical procedures. Characters that indicate close interrelationships among the investigated species include: presence of anisocytic to anomocytic stomata, amphistomatic leaves and glabrous or pubescent surfaces among others. Stellate trichomes prevailed on pubescent surfaces in all species, except for S. americanum, S. nigrum and S. macrocarpon. The results of this work, taken along with data from other sources, can be used to enhance the proper taxonomic evaluation of genus Solanum
This study presents a taxonomic revision of the Pteronia adenocarpa group. Six species are recogn... more This study presents a taxonomic revision of the Pteronia adenocarpa group. Six species are recognised within this group, namely P. adenocarpa, P. armatifolia, P. elongata, P. hutchinsoniana, P. stoehelinoides and P. viscosa. The group is distinct in its characteristic basally hairy cypselae, as opposed to the glabrous-glossy, glandular and/or variously hairy cypselae with the hairs evenly distributed throughout the surface found in the remaining species of the genus. We here present a detailed taxonomic treatment with descriptions, nomenclature, diagnostic characters, geographical distribution and maps, ecological information as well as the key to the species.
During taxonomic studies of the southern African genus Pteronia, four new species, P. armatifolia... more During taxonomic studies of the southern African genus Pteronia, four new species, P. armatifolia, P. decurrens, P. flava and P. glandulosa were uncovered from the Northern and Western Cape provinces of South Africa. We formally describe these four new species here and provide detailed descriptions, diagnostic characters, geographical distributions, as well as ecological information for each of the species.
Key to species of the <i>Pteronia adenocarpa</i> group 1. Cypselae glabrous-glossy, g... more Key to species of the <i>Pteronia adenocarpa</i> group 1. Cypselae glabrous-glossy, glandular and/or hairy, when hairy then hairs evenly distributed on the surface.................................................................................................................................................................................................. <b>remaining species of <i>Pteronia</i></b> - Cypselae hairy, hairs strictly confined to the base.............................................................................................................................2 2. Branches glabrous..............................................................................................................................................................................3 - Branches hairy..........................................................................................................................................................................
FIGURE 1. Species of the Pteronia adenocarpa group. A. P. adenocarpa fruit showing hairs strictly... more FIGURE 1. Species of the Pteronia adenocarpa group. A. P. adenocarpa fruit showing hairs strictly confined to the base; B. Habit of P. adenocarpa; C. Portion of P. adenocarpa pappus showing tortuous band near the base; D. Portion of P. armatifolia leaves showing cluster of bristles on the apex; E. Habit of P. elongata; F. P. stoehelinoides leaves showing hairs on abaxial surface of midrib; G. P. viscosa showing greyish-white branches and viscous involucral bracts. Vouchers: A & C. Goldblatt & Porter 12190, NBG; D. Burgoyne 10731, PRE; Source: B, E–G. iNaturalist.org. Photograph–A, C, D: AO Bello: B: Gigilaidler; E: Karooicus; F: Nicky; G: Knysna_wildflowers. Scales: A & C = 2 mm, D = 0.5 mm.
Epidermal features of ten Nigerian species of Solanum were studied, in order to find useful taxon... more Epidermal features of ten Nigerian species of Solanum were studied, in order to find useful taxonomic characters. Fresh leaf material was collected and treated by conventional anatomical procedures. Characters that indicate close interrelationships among the investigated species include: presence of anisocytic to anomocytic stomata, amphistomatic leaves and glabrous or pubescent surfaces among others. Stellate trichomes prevailed on pubescent surfaces in all species, except for S. americanum, S. nigrum and S. macrocarpon. The results of this work, taken along with data from other sources, can be used to enhance the proper taxonomic evaluation of genus Solanum
This study presents a taxonomic revision of the Pteronia adenocarpa group. Six species are recogn... more This study presents a taxonomic revision of the Pteronia adenocarpa group. Six species are recognised within this group, namely P. adenocarpa, P. armatifolia, P. elongata, P. hutchinsoniana, P. stoehelinoides and P. viscosa. The group is distinct in its characteristic basally hairy cypselae, as opposed to the glabrous-glossy, glandular and/or variously hairy cypselae with the hairs evenly distributed throughout the surface found in the remaining species of the genus. We here present a detailed taxonomic treatment with descriptions, nomenclature, diagnostic characters, geographical distribution and maps, ecological information as well as the key to the species.
During taxonomic studies of the southern African genus Pteronia, four new species, P. armatifolia... more During taxonomic studies of the southern African genus Pteronia, four new species, P. armatifolia, P. decurrens, P. flava and P. glandulosa were uncovered from the Northern and Western Cape provinces of South Africa. We formally describe these four new species here and provide detailed descriptions, diagnostic characters, geographical distributions, as well as ecological information for each of the species.
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