Family List (MO) |
Family List (INBio) | Cutting Edge
Draft Treatments |
The Cutting Edge
Volume XV, Number 3, July 2008
News and Notes |
Leaps and Bounds | Germane Literature |
Season's Pick | Annotate your copy
CONVOLVULACEAE. Two long-standing Ipomoea indets. (M. M.
Chavarría 625, INB; M. M. Chavarría & Solano 796, INB),
both unicates collected over 10 years ago from near Copey de Dota, have finally found a
proper home in I. dumetorum Willd. ex Roem. & Schult.,
otherwise reported only from the southwestern United States, Mexico, and South America.
This small-flowered sp. most resembles I. piurensis O’Donell, known
in Costa Rica only from the Río Tempisque lowlands, but can also be confused with
the mid-elevation I. ramosissima (Poir.) Choisy. From the former it differs
by its puberulent (vs. tomentose) seeds, from the latter by its scarious (vs.
undifferentiated) sepal margins, and from both by its muricate-based petioles and
gland-dotted sepals. The determination was confirmed via digital imagery by faithful
Convolvulaceae correspondent Dan Austin (ARIZ).
CUCURBITACEAE. Just under the wire for our next volume, Manual co-PI
Barry Hammel reports his discovery of a genus new to Costa Rica on flanks
of the highest peak on the Península de Nicoya, Cerro Vista al Mar (983 m).
This would be the monospecific Doyerea, previously recorded from Mexico to
Nicaragua, and in Colombia, Venezuela, and the West Indies, in the guise of D.
emetocathartica Grosourdy. Barry’s collection, from a canopy vine
ascending to at least 20 m on rocky ridges, is sterile, but he is supremely confident
of the determination.
EUPHORBIACEAE. We followed the circuitous route to this one. It all
began during the course of routine editorial correspondence regarding the Manual
Euphorbiaceae treatment, by José González (LSCR).
While perusing some Phyllanthus specimens at INB, Manual co-PI
Barry Hammel noticed several, generally identified as P.
amarus Schumach. & Thonn., that stood out by virtue of their unusually long
pedicels. This material did not otherwise concord with P. niruri L.,
the only weedy, herbaceous Phyllanthus sp. with comparably long pedicels
known from the region. Not knowing where to turn, co-PI Mike
Grayum recalled a cryptic and bothersome notation at the head of
José’s manuscript: “Phyllanthus tenellus Roxb.
según Pove está acá, introducida.” Taking seriously
any pronouncement by sage Luis Poveda (JVR), Grayum had already
followed up on this claim, but failed to locate any Costa Rican specimens determined
as P. tenellus, or any literature records of that sp. (an Old World native)
for Costa Rica. But now, reviewing the relevant literature with Barry’s
aberrant specimens in mind, he encountered the following statement: “The
long pendent capillary fruiting pedicels of P. tenellus are diagnostic, and
of course no other herbaceous West Indian species has male flowers with five free
stamens” (Webster, J. Arnold Arbor. 38: 56. 1957). Not having bothered
to investigate the tiny staminate flowers on the INB specimens, Barry now did so, and
bingo! Everything fell into place. It turns out that P. tenellus,
first collected from Costa Rica in 1990, is one of the more common weedy
Phyllanthus spp. in the Valle Central, and grows right under our noses on INBio
property! Subsequent conversations with Poveda revealed that it is also abundant
on the campus at the Universidad Nacional Autónoma in Heredia, and that Pove and
colleague Pablo Sánchez-Vindas (JVR) had nailed the ID some time
ago. Without their lead, however indirectly communicated, this sp. would very
likely have been omitted from the Manual.
ROSACEAE. The recent visit to INB by family specialist Katya
Romolereux (QCA) continues to bear fruit [see
The Cutting Edge 15(2): 1, 3,
Apr. 2008]. A specimen (J. Quesada et al. 2004, INB) collected at
3000–3150 m elevation near the summit of Cerro Echandi on the Panamanian border
was determined by Katya as Lachemilla fulvescens (L. M. Perry) Rothm., formerly
known only from South America (Colombia to Bolivia and Venezuela). We thank INB
biologist Daniel Santamaría for this alert.