88 research outputs found
Charles Louis Craib : natural historian extraordinaire
An appreciation is provided of Charles
Louis Craib’s (21st May 1954 – 19th March 2012)
contributions to our knowledge of the southern
African succulent and bulb floras, particularly
aloes, pelargoniums and bushman candles.Die von Charles Louis Craib
(21. May 1954 – 19. März 2012) verfassten
Beiträge zu unseren Kenntnissen
über die Sukkulenten- und
Zwiebelpflanzenflora, insbesondere zu
Arten von Aloe, Pelargonium und
Buschmanns Kerzen, des südlichen
Afrikas werden gewürdigt.http://www.bcss.org.uk/journal.htmlam201
A second species of Furcraea Vent. (Agavaceae), F. tuberosa (Mill.) W.T.Aiton, naturalised in South Africa
Furcraea tuberosa (Mill.) W.T.Aiton
(Agavaceae) is recorded as having become naturalised
in the Mpumalanga Province of South
Africa. A description and illustrations of the
species in South Africa are provided, and it is compared
with F. hexapetala (Jacq.) Urb., with which
it can be confused taxonomically. A key based on
vegetative characters to distinguish among
F. tuberosa, F. foetida (L.) Haw. and F. selloa
K.Koch, the latter two being commonly grown or
naturalised in South Africa, is included.Furcraea tuberosa (Mill.)
W.T.Aiton ist in der Provinz Mpumalanga, Südafrika,
verwildert. Eine Beschreibung und Abbildungen
der Art in Südafrika ergänzen einen
Vergleich mit F. hexapetala (Jacq.) Urb., mit welcher
sie taxonomisch verwechselt werden kann.
Zusätzlich wird ein Schlüssel veröffentlicht, um
zwischen F. tuberosa, F. foetida (L.) Haw. und
F. selloa K.Koch (die letzten beiden in Südafrika
häufig angepflanzt oder verwildert, zu unterscheiden.http://www.bcss.org.uk/journal.htmlam201
Names associated with Aloe speciosa Baker (Asphodelaceae), a common species in the Western and Eastern Cape Provinces of South Africa
We argue that the names Aloe hexapetala
Salm-Dyck, A. drepanophylla Baker, Aloe
chloroleuca Baker and Aloe platylepis Baker
should not be regarded as competing with the
name Aloe speciosa Baker. The latter name is
well-known, widely used, and can be easily linked
to natural populations of an aloe that is widespread
in South Africa’s Western and Eastern
Cape Provinces. The other names are to be regarded
as insufficiently known.Wir sind der Meinung, dass
die Namen Aloe hexapetala Salm-Dyck, A.
drepanophylla Baker, Aloe chloroleuca Baker und
Aloe platylepis Baker nicht derart zu interpretieren
sind, dass sie den Namen Aloe speciosa
Baker konkurrenzieren. Dieser letzt-genannte
Name ist gut bekannt, wird weitherum verwendet,
und kann leicht mit natürlichen Populationen
einer Aloe in Verbindung gebracht werden, die in
den südafrikanischen Provinzen Western Cape
und Eastern Cape weit verbreitet ist. Die übrigen
Namen sollten als "ungenügend bekannt" betrachtet
werden.http://www.bcss.org.uk/journal.htmlam201
South Africa's ongoing Opuntia Mill. (Cactaceae) problem : the case of Opuntia tomentosa Salm-Dyck
Opuntia tomentosa Salm-Dyck is
recorded as having become naturalised in the
Eastern Cape Province of South Africa. A description
and illustrations of the species in South
Africa are provided, along with a discussion of the
characters that distinguish it from Opuntia ficusindica
(L.) Mill., the only other tree-like opuntia
that has become naturalised in the country.Opuntia tomentosa Salm-
Dyck wird als verwildert für die Eastern Cape-
Provinz von Südafrika nachgewiesen. Es wird
eine Beschreibung mit Abbildungen des Taxons in
Südafrika gegeben, zusammen mit einer Diskussion
der Merkmale, die es von der einzigen weiteren,
im Land verwilderten baumförmigen
Opuntienart Opuntia ficus-indica (L.) Mill.
unterscheiden.http://www.bcss.org.uk/journal.htmlam201
Responsible species description : a change of attitude is needed to facilitate and improve access to biological material
It remains one of the primary responsibilities of taxonomists to describe and concomitantly disseminate information
about the novelties they discover through their research efforts and associated herbarium and field work. However, given the
present-day emphasis on benefit sharing concerning access to components of biodiversity, taxonomists should be much more
circumspect when conducting field- and other work in foreign countries. It is imperative that project proposals submitted for
consideration for support or funding take cognizance of the needs of taxonomists and biodiversity specialists in the countries
in which fieldwork is to be conducted.http://www.botanik.univie.ac.at/iapt/s_taxon.phpnf201
The family Crassulaceae in continental Portugal
Apart from two present-day centres of
high species diversity, one in southern Africa and
the other in Mexico, the Crassulaceae, a large
family of mainly herbaceous leaf succulents, is
also well-represented in Europe in terms of both
genera and species. One of these genera, the predominantly
continental European genus Sedum
L., has for a long time been acknowledged as in
need of being split into smaller, more homogenous
genera. The recent implementation of some of
these taxonomic proposals is here applied to the
crassuloid taxa of continental Portugal (islands
excluded), with particular reference to Petrosedum
Grulich. An updated and expanded checklist
of the genera and species of Crassulaceae occurring
in Portugal is provided, along with notes on
differences between Sedum and Petrosedum.
Thirty-six species of Crassulaceae are now recorded for Portugal (continent, excluding islands),
of which 14 are introduced.http://www.bcss.org.uk/journal.htmlhb201
Notes on the nomenclature of species of Agave L. (Agavaceae / Asparagaceae) grown in and described from European gardens and nurseries
Several species of Agave L. (Agavaceae
/ Asparagaceae) have intricate nomenclatural histories,
given that material imported into Europe
from their New World habitats took several years,
if not decades to flower, resulting in hasty and
cryptic descriptions often being based on vegetative
material only. Furthermore, multiple authors
sometimes, but not always, used the same binomials
to refer to plants known in cultivation, making
it important to clarify and establish correct
author citations to determine which species are
referred to. In this paper we clarify the use of the
well-known names Agave applanata Hort. ex
K.Koch, A. verschaffeltii Lem. ex Jacobi and A.
ghiesbreghtii Hort. ex Jacobi. In addition, notes
are provided on 12 further species names that K.
Koch established and, where appropriate, furnished
by him with descriptive statements in an
often overlooked paper that he published in 1862.http://www.bcss.org.uk/brad.phphb201
Type specimens online : what is available, what is not, and how to proceed ; reflections based on an analysis of the images of type specimens of southern African Polygala (Polygalaceae) accessible on the worldwide web
The results of a gap analysis of the availability of internet-hosted images of the types of names of Polygala L. (Polygalaceae)
in southern Africa accessible at JSTOR Global Plants (JGP) and on other sites in the worldwide web, are presented.
The type information for names associated with this genus was recorded and analyzed with a view to suggest ways in which
JGP and other internet resources that host specimen images might further expand and enrich their e-holdings, and to identify
which non-partner institutions should be approached to collaborate in the Global Plants Initiative (GPI), the most successful
specimen imaging thrust ever. Our analysis shows that images of 52% of the types of southern African Polygala names (208
names assessed) are accessible at JGP. Of these images, 74% have incorrect metadata or no information on what sort of type
it depicts. For 25% of the accepted taxa of Polygala, no images of the types of their names are available online. This gap can
mostly be filled by GPI partners who hold the majority of the types not yet imaged, most of which are likely not in type folders
or do not carry annotations indicating their type status. JGP would significantly benefit from directly contracting taxonomic
services to improve the quality of its data on types, thus enabling information to be fed back to partner institutions.The Andrew W. Mellon Foundation is thanked for financial support
for the Global Plants Initiative, and its forerunners, the African
Plants Initiative and the Latin American Plants Initiative.http://www.botanik.univie.ac.at/iapt/s_taxon.phpam201
Clarifying the application of the long-confused name Aloe commutata, and the establishment of Aloe ×commutata Tod. (Asphodelaceae)
The taxonomic history and application
of the long-confused name Aloe commutata Tod. is
reviewed and clarified. The name had previously
been variously included in the synonymy of Aloe
macrocarpa Tod., A. maculata All. and A. grandidentata
Salm-Dyck. We agree with Reynolds
(1950) that it shows characters that are intermediate
between the latter two species and is likely
a hybrid between them. Given the distinct horticultural
value of this hybrid, the name is here
resurrected as Aloe ×commutata Tod. We also
show that Engler never published a later
homonym, Aloe commutata Engl.; his misapplied
use of the name in a specific sense [A. commutata
sensu auct. Engler (1892)], however, became
entrenched in the literature.Die taxonomische Geschichte
und Anwendung des lange fehlinterpretierten Namens
Aloe commutata Tod. wird analysiert und
geklärt. Der Name wurde früher unteschiedlich
als Synonym von Aloe macrocarpa Tod., A. maculata
All. und A. grandidentata Salm-Dyck betrachtet.
Wir stimmen mit Reynolds (1950)
überein, dass das Taxon Merkmale zeigt, die zwischen
den zwei letztgenannten Arten stehen, und
dass es sich wahrscheinlich um die entsprechende
Hybride handelt. Unter Berücksichtigung des
klaren gärtnerischen Potentials dieser Hybride
wird der Name hier als Aloe ×commutata Tod.
wieder aufgenommen. Wir zeigen zudem, dass
Engler nie ein späteres Homonym Aloe commutata
Engl. publizierte, aber seine fälschliche Anwendung des Namens [A. commutata sensu
auct. Engler (1892)] auf Artebene hat sich tief in
die Literatur eingegraben.http://www.bcss.org.uk/journal.htmlam201
A further species of Agave L., A. salmiana Otto ex Salm-Dyck (subsp salmiana) var. salmiana (Agavaceae), naturalised in the Eastern Cape Province of South Africa
Agave salmiana Otto ex Salm-Dyck
subsp. salmiana var. salmiana, the typical variety
of this large-growing Mexican species, is here
recorded as having become established in South
Africa’s Eastern Cape Province. A description and
key that can be used to distinguish it from
A. americana L. subsp. americana var. americana
and A. americana subsp. americana var. expansa
(Jacobi) Gentry, both of which are large-growing
and more widely naturalised in southern Africa,
are provided. A comprehensive chronological synonymy
summarises the complex nomenclatural
and taxonomic histories of the species.Agave salmiana Otto ex
Salm-Dyck subsp. salmiana var. salmiana, die typische
Varietät dieser grosswüchsigen mexikanischen
Art, wird hier als in der südafrikanischen
Eastern Cape Province verwildert nachgewiesen.
Eine Beschreibung und ein Bestimmungsschüssel
erlauben die Unterscheidung des Taxons von zwei
weiteren grosswüchsigen, im südlichen Afrika
weit verbreitet verwilderten Taxa, A. americana
L. subsp. americana var. americana und A. americana
subsp. americana var. expansa (Jacobi)
Gentry. Eine umfassende chronologische Synonymie
fasst die komplexe nomenklatorische und
taxonomische Geschichte der Art zusammen.http://www.bcss.org.uk/journal.htmlam201
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