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The Cutting Edge Volume V, Number 3, July 1998
News and Notes | Recent Treatments | Leaps and Bounds | Germane Literature
Carter, R. & S. D. Jones. 1998 ['1997']. Notes on the Cyperus
retroflexus complex (Cyperaceae) with three nomenclatural proposals.
Rhodora 99: 319--334.
A key to the C. retroflexus complex includes C. hermaphroditus
(Jacq.) Standl. and C. tenuis Sw., both of which occur in Costa Rica.
Three new combinations are proposed, none of which concerns us.
Downie, S. R., S. Ramanath, D. S. Katz-Downie & E. Llanas. 1998.
Molecular systematics of Apiaceae subfamily Apioideae: phylogenetic analyses
of nuclear ribosomal DNA internal transcribed spacer and plastid rpoC1
intron sequences. Amer. J. Bot. 85: 563--591.
Apiaceae subfam. Hydrocotyloideae here emerges as polyphyletic, with some
members (including Hydrocotyle and perhaps Centella) comprising
a sister group to all examined Araliaceae. The last-mentioned family (with
Hydrocotyle etc. included) is monophyletic, and the sister group
to all other examined Apiaceae. This scenario undermines recent overtures
to unite the two families on the premise that the herbaceous Apiaceae are
nested within the tropical, woody Araliaceae. Back and forth we go!
Dressler, R. L. 1998. A new white Sobralia from Costa Rica.
Orchid Digest 62: 89--91.
Sobralia kerryae Dressler (Orchidaceae), named for the author's talented
wife, is based on a specimen collected at 1150 m elevation in the Cordillera
de Tilarán near Monteverde. The sp. had been recognized as new from
photographs of an earlier specimen, not collected, encountered at ca. 800--1000
m elevation in the Fila Costeña near Pejibaye, in the Valle de El
General. The new sp. is compared with Sobralia macrophylla Rchb.
f. Features a detailed line-drawing, as well as a color photo of a living
Luer, C. A. 1998. Systematics of the subgenus Crocodeilanthe
of Pleurothallis (Orchidaceae). Pp. 1--82 in, C. A. Luer,
Icones pleurothallidinarum XVI. Monogr. Syst. Bot. Missouri Bot. Gard.
We count 64 spp. in this subgenus, ranging from Central America to coastal
Venezuela and central Brazil. Most comprise comparatively large plants,
with long racemes of many, small flowers that open simultaneously. None
of the 18 new spp. here validated occurs in Costa Rica, from which just
three spp. are recorded: the unique endemic Pleurothallis atwoodii
Luer, known by a single collection from the Dota region; and the more widespread
P. floribunda Poepp. & Endl. and P. pulchella (Kunth)
Lindl. Includes a subgenus description, key to spp., sp. descriptions,
lists of exsiccatae, index to scientific names, and line-drawings of all
spp. (but no distribution maps).
----. 1998. Systematics of the subgenus Rhynchopera of Pleurothallis
(Orchidaceae). Pp. 83--94 in, C. A. Luer, Icones pleurothallidinarum
XVI. Monogr. Syst. Bot. Missouri Bot. Gard. 65: 1---122.
This subgenus of eight spp. ranges from Costa Rica to Bolivia, Venezuela,
and the Dominican Republic. Pleurothallis loranthophylla Rchb. f.,
the only sp. occurring in Costa Rica, ranges nearly as widely. In Costa
Rica, it occurs at ca. 600--2000 m elevation. No new spp. are described
here. This article has the same features as the preceding one.
Pool, A. 1998. Notes on Central American Scutellaria (Lamiaceae).
Novon 8: 62--66.
Two new spp. are described, only one of which occurs in Costa Rica. Scutellaria
tenuipetiolata A. Pool, a purplish-flowered member of sect. Uliginosae,
is endemic, known only from the Atlantic slope of the Cordillera de Talamanca
at ca. 50--200 m elevation. Features regional keys to and discussions of
spp. in sects. Cardinales and Uliginosae, including the first
Costa Rican and Central American report of Scutellaria hookeri Epling,
otherwise recorded only from Colombia and Peru. Detailed, composite line-drawing
of the new sp.
Silba, J. 1998. A monograph of the genus Cupressus L. J.
Int. Conifer Preserv. Soc. 5(2): 1--98.
Cupressus (Cupressaceae) comprises 25 spp. of the northern hemisphere,
here grouped in two subgenera with a total of seven sections (two newly
described). The natural range of the genus in the New World extends from
Oregon to (apparently) Honduras. Collections of the mainly Mexican Cupressus
lindleyi Klotzsch are cited from Nicaragua and Panama, but these (presumably)
derive from cultivated plants. The sp. most commonly cultivated in Costa
Rica has generally been called C. lusitanica Mill., here described
as native to India, where it is extinct in the wild. However, no Central
American collections of that sp. are cited, and no light is shed on the
identity of our material. Includes a key to spp., brief descriptions, limited
citations of exsiccatae, and glued-on, black-and-white prints, mostly of
herbarium specimens. This is a very funky, homemade production that was
probably not distributed to more than a handful of major botanical libraries.
Snow, N. 1998. Nomenclatural changes in Leptochloa P. Beauvois
sensu lato (Poaceae, Chloridoideae). Novon 8: 77--80.
The combination Leptochloa fusca (L.) Kunth subsp. uninervia
(J. Presl) N. Snow is here validated for a widespread taxon (occurring in
Costa Rica) known most recently as L. uninervia (J. Presl) Hitchc.
& Chase. The name Leptochloa fusca is used in preference to
the earlier but much less familiar L. malabarica (L.) Veldkamp, which
has been proposed for rejection [see The Cutting Edge 5(2): 8, Apr. 1998].
Tryon, R. 1998 ['1997']. Systematic notes on Oleandra. Rhodora
A synoptic "classification" of the American spp. of Oleandra
(Polypodiopsida: Davalliaceae), without species descriptions. Just four
spp., all represented in Costa Rica, are recognized for the New World:
Oleandra articulata (Sw.) C. Presl, O. bradei H. Christ, O.
pilosa Hook. (including O. decurrens Maxon), and O. lehmannii
Maxon (including O. costaricensis Maxon). The names indicated
parenthetically are those accepted in the recent (1995) Flora mesoamericana
treatment (1: 289--290) by Mónica Palacios-Ríos. Tryon
considers that O. bradei, the sole Costa Rican endemic, "...may
well be a variant of O. articulata. There seems to be little reason
for its recognition as a species." Features one composite photographic
plate. The Old World species are discussed very briefly.