Family List (MO) |
Family List (INBio) | Cutting Edge
Draft Treatments |
Guidelines | Checklist | Citing | Editors
The Cutting Edge Volume VI, Number 1, January 1999
News and Notes | Recent Treatments | Leaps and Bounds | Germane Literature
BETULACEAE. J. Francisco Morales (INB).
Chico puts his personal spin to a family already treated in Flora costaricensis by specialist
John J. Furlow (Fieldiana, Bot. 40: 56--58. 1977). The basic story
is unchanged: Costa Rica has but a single sp., the widespread Alnus
COMMELINACEAE. J. R. Grant (ALA), R. B. Faden (US) &
B. Hammel (INB/MO).
This family of mostly weedy herbs is represented in Costa Rica by 10 genera with 38 spp. Our largest genus is Tradescantia, with 8 spp., followed by Commelina and Tinantia, with 7 spp.
each. Three sp. names are as yet unpublished, and one sp. is given a provisional name. Murdannia nudiflora (L.) Brenan is introduced from Asia, and two other spp., Callisia repens (Jacq.) L. and Tradescantia zebrina hort. ex Bosse, are cultivated and also perhaps indigenous. Five
exotic, cultivated spp. are discussed under the appropriate generic descriptions: Callisia warscewicziana (Kunth & C. D. Bouché) H. E. Moore, Dichorisandra thyrsiflora J. G. Mikan, Gibasis pellucida (M. Martens & Galeotti) D. R. Hunt, Tradescantia pallida (Rose) D. R. Hunt, and T. spathacea Sw. One sp., Tradescantia soconuscana Matuda, is included hypothetically, based solely on a Flora mesoamericana citation. Just two spp., Tradescantia grantii Faden ined. and T.
petricola J. R. Grant ined., are Costa Rican endemics. Other noteworthy departures from D. R. Hunt's (1994) Flora mesoamericana treatment are the definitive attribution, to Costa Rica, of the following spp.: Commelina diffusa Burm. f., Tinantia glabra (Standl. & Steyerm.) Rohweder,
T. parviflora Rohweder, T. violacea Rohweder, and Tripogandra amplexicaulis (Klotzsch ex C. B. Clarke) Woodson.
GROSSULARIACEAE. J. Francisco Morales (INB).
Escallonia, Phyllonoma, and Ribes, included (with Hydrangea) in
Saxifragaceae during Standley's era, are here grouped according to the Cronquistian
standard originally adopted by the Manual project for dicots. Now, only
Ribes would remain here; Escalloniaceae and Phyllonomaceae apparently
have substantially different affinities, the latter with Aquifoliaceae (see
first entry under "Germane Literature"). Nonetheless, practical
considerations may require that we stand by Cronquist (see third entry under
"News and Notes"), here and in most similar cases. Having said
that, the three genera listed above are represented in Costa Rica by a total
of six spp.: Escallonia myrtilloides L. f., E. paniculata
(Ruiz & Pav.) Roem. & Schult., Phyllonoma latiscuspis (Turcz.)
Engl., P. ruscifolia Willd. ex Schult., P. tenuidens
Pittier, and Ribes leptostachyum Benth. The sp. total and generic
subtotals match Standley's (1937), notwithstanding some differences in both
nomenclature and taxonomy. Only Phyllonoma tenuidens is (apparently)
endemic. Phyllonoma latiscuspis is here attributed to Costa Rica
for the first time (see under "Leaps and Bounds").
OCHNACEAE. J. Francisco Morales (INB).
This smallish family is represented in Costa Rica by Cespedesia, Elvasia, Ouratea,
and Sauvagesia, the first two by a single sp. each, Ouratea
by seven spp., and Sauvagesia by three spp. Except for the herbaceous
Sauvagesia, these are all trees or shrubs. Three spp. are believed
endemic: Ouratea lucens (Kunth) Engl., O. osaensis Whitef.,
and O. rinconensis Whitef. The treatment of Ouratea has benefited
much from the recent work of Caroline Whitefoord (BM) for Flora
mesoamericana (see Novon 2: 274--281. 1992). The first Mesoamerican
report of the genus Elvasia was printed (we shudder to say "published")
in these pages just a few years back [see The
Cutting Edge 3(3): 3, Jul. 1996].
THYMELAEACEAE. J. Francisco Morales (INB).
Costa Rica's modest representation of this family consists of four spp. of Daphnopsis
and Schoenobiblus panamensis Standl. & L. O. Williams. Only
Daphnopsis costaricensis Barringer & Grayum is endemic. Costa
Rican collections previously attributed to the Panamanian Daphnopsis
folsomii Barringer & Nevling [see The
Cutting Edge 4(4): 2, Oct. 1997] have proven to represent various other
spp., chiefly Daphnopsis hammelii Barringer & Nevling (first
Costa Rican report) and D. morii Barringer & Nevling. Panama
regains D. folsomii as an endemic, but loses D. hammelii in
VIOLACEAE. Harvey E. Ballard, Jr. (BHO).
Treats seven genera in Costa Rica with a total of 29 spp., of which two (Viola odorata L.
and V. patrinii Ging.) are cultivated and/or naturalized. The only
genera with more than one Costa Rican sp. are Hybanthus (11 spp.),
Rinorea (8 spp.), and Viola (4 indigenous spp.). Just two
spp. are endemic: Hybanthus guanacastensis Standl. and the recently
described H. hespericlivus H. E. Ballard, Wetter & N. Zamora.
With the exception of Viola and two spp. of Hybanthus [H.
attenuatus (Humb. & Bonpl.) Schulze-Menz and H. oppositifolius
(L.) Taub.], all of our taxa are woody. No spp. are here described as new.