RubiacearumAmericanarum Magna Hama Pars I.1 A New Species of Chomeliafrom Panama David H. Lorer?re NationalTropical Botanical Garden, 3530 PapalinaRoad, Kalaheo,Kauai, Hawaii 96741, U.S.A. [email protected] CharlotteM. Taylor MissouriBotanical Garden, P.O. Box 299, St. Louis, Missouri63166, U.S.A. charlotte.taylor@mobot .org ABSTRACT.The new species Chomeliarubra Lor- valvate-induplicatecorolla lobes with the margins ence & C. M.Taylor, described and illustrated here, crispedand sometimesalso appendaged,but care- is knownonly fromcentral Panama. This new spe- ful studyof this featuredisclosed that it showscon- cies has red to pink flowersthat are sessile and tinuous variationand sometimesvaries within a solitaryor few in subsessile short cymules. This single species;therefore these twogenera are better new species has previouslybeen confusedwith C. combined(Steyermark, 1967). The neotropicalge- recordiiStandley. nus ChomeliaJacquin should not be confusedwith ChomeliaL., whichis a synonymof the whollypa- RESUMEN.La especie nuevaChornelia rambra Lor- leotropicalgenus TarennaGaertner (Pavetteae). ence & C. M. Taylor,aquf descrita e ilustrada,esta registradasolamente de Panamacentral. Esta es- pecie nuevatiene floresrojas a rosadas,y sesiles y Chomelia rubra Lorence& C. M. Taylor,sp. nov. solitariaso pocas en cimulascorta subsesiles. An- 1sYPE:Panama. Colon: Santa Rita caminoa teriormenteesta especie nuevaha sido confundida zonamaderera, 10 Oct. 1968, M. 0. CorreaA. con Ch. recordiiStandley. & R L. Dressler1092 (holotype,PMA; isotypes, Key words: Chomelia,Mesoamerica, Panama, DUKE-265877,NI0-2393591). Figure 1. Rubiaceae. Haecspecies Chornelia recordii Standley similis, sed ab ea lobuliscalycinis 1-2 mmlongis atquecorollae rubrae Duringstudy of recentRubiaceae collections for vel roseaeextus strigulosae lobulis ca. 2.5 mmlongis ob- tusis vel rotundatisdistinguitur. the FloraMesoamericana, a number of undescribed species have been discovered, and taxonomic Shrubs,treelets, or trees to 4 m tall, unarmed; changesfor other species have becomeindicated. branchletsstrigulose to glabrescent.Leaves ovate to This article is the first of a series presentingthis elliptic-ovate,2.2-11 x 1.24 cm, chartaceousto new informationin detail, beyondthat allowedby subcoriaceous,adaxially glabrous, abaxially hirtel- the synopticformat of the Flora Mesoamericana. lous to glabrescent,at base roundedto truncateor ChomeliaJacquin (Guettardeae) comprises about cordulate,at apex acute to somewhatacuminate 50 (Steyermark,1974) to 76 (Andersson,1992) with the acumen ultimatelyacute and apiculate; species foundin the Neotropics,from central Mex- costa plane to prominulousadaxially, prominulous ico to Paraguay.This genusis characterizedby ax- to prominentabaxially; secondary veins 3 to 7 illaryinflorescences, a four-lobedto rarelytruncate pairs, eucamptrodromousto brochidodromous,in (e.g., C. microlobaDonnell Smith) calyx, tubular to axils withfoveolate ("crypt type") domatia, the axils salverformcorollas with fourvalvate or valvate-in- and/orthe domatiaglabrous or usuallypilosulous; duplicate lobes, four stamens, and drupaceous minorvenation not or weaklyvisible and apparently fruits with a single 2- to 3-celled pyrene. Some not lineolate;petioles 14 mmlong; stipules persis- species have leaves with distinctiveclosely lineo- tent or caducous,triangular, 2-3.5 mm long, acute late (i.e., closely set and parallel)tertiary leaf ve- to acuminate,externally strigulose. Flowers axillary nation and scorpioidcymes. AnisomerisC. Presl (i.e., producedwith the leaves)and/or ramular (i.e., was formerlyseparated from Chomelia based on its producedon stemsbelow the leaves),1 to 5, sessile 1"A Big Bucketof AmericanRubiaceae," of whichthe presentcontribution contains the firstfew drops. NOVON11: 124126. 2001. Volume 1 1, Number1 Lorence & Taylor 125 2001 Chomeliarubra from Panama B IE E U) Figure 1. Chomeliarubra Lorence & C M T 1 Inflorescencewith flower. ay or; based on Correa& Dressler1092. A. Floweringstem. B. and solitaryor subsessilein a congestedcymule, ests at 30s500 m in eentralPanama; colleeted this cymulesessile to subsessile;bracts triangular with flowers in Juneand October, with fruits in Jan- to linear,0.14.8 mmlong, acute, strigulose; hy- uary. panthiumturbinate, ca. 1 mmlong, densely stri- Thisnew speeies is similarin generalaspeet and gulose;calyx limb externally strigulose, with tube manydetails to Chorneliarecordii, and these have 0.5-1 mmlong, lobes 4, linearto triangular,1-2 previouslybeen eonfused. Chomelia recordii, how- mmlong and sometimes unequal on an individual ever,has leavesthat are apieallyaeuminate with flower,acute; corolla in budclavate, at anthesistu- the aeumenultimately rounded to obtuse,flowers bular,red to pink,externally strigulose except gla- thatare solitary or pairedand terminal or axillary, brouson marginsof lobes,with tube 15-16 mm hypanthium192 mmlong, ealyx limb with the long,lobes 4, elliptic,ca. 2.5 mmlong, obtuse to tube 1-3 mmlong and the lobes 24 mmlong, rounded,entire; anthers 4, ca. 2.5 mmlong, par- eorollawhite to ereamand externally pilose to se- tiallyexserted; stigmas oblong, ca. 1 mmlong, sit- rieeous,eorolla lobes >5 mmlong and aeute, and uatedca. 3/4 thelength of thecorolla tube above its fruits7-10 x $5 mmand strigulose to hirtellous. base.Fruits oblong, ca. 15 x 6 mm,slightly flat- Thespeeifie epithet refers to thecolor of the flowers tened laterally,glabrescent; pyrenes smooth, 2- of thisnew speeies, whieh is unusualin (Chornelis. celled. Paratypes. PANAMA.Cocle: CoclecitoRoad, eleva- Habitat,distribution, and phenology. Moist for- tionaltransect from 1 mi. beyondthe divide to the ridge Novon 126 top,8°42'N, 80°28'W, de Neverset al. 6759 (MO).Colon: travelby the second authorto consultthat collec- SantaRita lumberroad, ca. 15 km E of Colon,Dressler & Correa3727 (MO);Santa Rita lumberroad, 8.7 km E of tion. TransisthmiaHighway, Folsom 3696 (MO). LiteratureCited Andersson,L. 1992. A provisionalchecklist of neotropical Acknowledgments.We thank the curators of Rubiaceae.Scripta Bot. Belg. 1: 1-199. DUKE F, and PMAfor access to specimensand Steyermark,J. A. 1967. Chomelia.In: B. M. Maguire& information,and in particularMireya Correa; Roy Collaborators,The Botanyof the GuayanaHighlands. E. Gereaufor preparationof the Latin diagnosis; Mem.New YorkBot. Gard.17(1): 333-341. 1974. Rubiaceae.In: T. Lasser(editor), Flora de two anonymousreviewers for constructivecom- Venezuela9: 1-2070. InstitutoBotanico, Direccion de mentson the manuscript;and RobinFoster and the RecursosNaturales Renovables, Ministerio de Agricul- Field Museumof NaturalHistory for supportfor turay Crfa.Caracas, Venezuela. .