Coussarea hallei Steyerm.
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Authority
Maguire, Bassett. 1972. The botany of the Guayana Highland--part IX. Mem. New York Bot. Gard. 23: 1-832.
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Family
Rubiaceae
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Scientific Name
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Description
Latin Diagnosis - Arbor, ramis glabris; stipulis breviter vaginantibus 3-5 mm altis 7-8 mm latis apice in lobos deltoideos breves elevato; foliis petiolatis, petiolis 15-25 mm longis glabris, laminis coriaceis elliptico-oblongis vel late oblongis apice abrupte acuminatis vel caudatis, acumine 1.5 cm longo, basi obtusis vel acutis 18-21 × 10-11 cm supra glabris subtus ut videtur glabris autem secus costam mediam pilis microscopicos instructis ceterum glabris, nervis lateralibus utroque latere 8-10 supra impressis subtus valde elevatis inferioribus patentibus superioribus adscendentibus ante marginem 5-10 mm manifeste anastomosantibus, venulis tertiariis subtus valde laxeque reticulatis ele-vatisque supra vix manifestis; inflorescentia laxe paniculata pauciflora 6 × 5 cm 6-7 axes laterales gerenti pedunculata, pedunculo 2-2.5 cm longo glabro, axibus lateralibus infimis 1.5-3 cm longis supremis 1.1-1.2 cm longis puberulentibus pilis microscopicis munitis vel fere glabris; floribus in apice ramulorum plerumque ternatis subsessilibus vel breviter 1 mm pedicellatis; calyce hypanthioque profunde campanulato 4.5-5 × 3.5 mm microscopice puberulenti, calycis tubo 3-3.5 mm longo 4.5 mm lato apice subtruncate intus glabro autem prope medium glandulis 3-4 aggregatis dispositis ornato; calycis dentibus minutis; corollis hypocrateriformibus 65 mm longis, tubo 43 mm longo basi 2 mm lato fauce 3 mm lato extus minute adpresso-puberulenti intus ut videtur glabro autem minute puberulenti, lobis lineari-lanceolatis apice angustatis obtusis extus minute puberulentibus intus glabris carinatisque; staminibus inclusis ad 3/4 longi-tudinis affixis, antheris linearibus 6.5 mm longis, filamentis 1.5 mm longis infra basin loborum corollae 7 mm insertis; disco truncato depresso; stylo 18-20 mm longo parce puberulenti; baccis late oblongis superne rotundatis basi angustatis obtusis immaturis 18-20 × 10-12 mm, mesicarpio crasso glabro.
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Discussion
Type. Route du lac des Americains, French Guiana, 30 Jan 1965, Francis Halle 1018 (holotype P, flowering; isotype P, fruiting).
This taxon is related to C. grandis Muell.-Arg. from which it differs in the longer corolla, minutely puberulent interior of the corolla tube, especially in its lower half, longer anthers, longer peduncles, and more abundantly flowered and branched inflorescence.