Maguireocharis neblinae 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 - Suffrutex vel arbuscula 0.6-4 m alta; ramulis novellis dense hirtellis vetustioribus glabratis vel glabris; stipulis lanceolato-oblongis apice rotundatis vel obtusis 1.5-2 × 0.6-0.8 cm extus plerumque glabris vel prope medium basique parce pilosulis intus glabris; foliis oppositis petiolatis, petiolis 4-20 mm longis parce puberulis vel glabris, laminis oblongis vel ovali-oblongis apice late rotundatis vel subtruncatis basi rotundatis vel subobtusis 2.5-10 × 1.2-4.5 cm supra glabris subtus praecipue glabris autem reticulo celluloso cinereo necnon squamis orbicularibus puncticulosis obtectis; nervis lateralibus utroque latere 6-11 supra leviter impressis subtus leviter prominulis haud anastomosantibus ante marginem desinentibus, venulis tertiariis nullis vel reticulo celluloso cinereo occultis; inflorescentiis terminalibus vel in axillas superiores ramu-lorum assurgentibus cymosis 5-5.5 cm longis, axibus inferioribus 6-7 mm longis, inflorescentiae ramulis ultimis 22-25-floris; pedunculis tenuibus 2-3.5 cm longis dense hirsutulis; floribus sessilibus vel lateralibus 2 mm pedicellatis; calyce hy-panthioque 3-4 mm longo, hypanthio 1.5-2 mm longo hispidulo cellulis papillatis albidis obtecto, calycis tubo nullo vel vix evoluto, lobis 5 triangulari-lanceolatis acutis inaequalibus 1.2-1.5 × 0.7 mm discum excedentibus, loborum sinubus extus glandulis munitis; bracteis floralibus triangulari-lanceolatis acutis 1.2-1.8 × 0.5 mm basi glandulis munitis; corollis infundibuliformi-hypocrateriformibus 12-13 mm longis, tubo 7.5-8 mm longo basi 3-3.5 mm lato fauce 3.5 mm lato extus glabro autem papillata albido incrustato intus parte inferiore 5 mm glabrata inde parte superiore papillato-puberula, lobis 5 oblongo-lanceolatis subacutis 4.5 × 1.5 mm extus glabris intusdense villosis; corollae tubo lobisque extus, calycis lobis ubique, hypanthio pedicellisque cellulis albidis dense incrustatis obtectis; staminibus 5, apicibus paulo exsertis, antheris lineari-oblongis 3 mm longis basi rotundatis in appendicem papilloso-hispid-ulam 0.1-0.2 mm longam desinentibus, thecarum marginibus pilis ascendentibus parce hispidulis, filamentis 2.5 mm longis glabris 5 mm supra basin tubi affixis; stylo 4.5 mm longo glabro autem papillata albido incrustato obtecto; ovario 2-loculare, ovulis numerosis verticaliter imbricatis ad centrum affixis suborbicularibus; capsulis ellipsoideo-ovoideis vel elliptico-oblongis 12-14 × 4-6 mm glabris; seminibus alatis oblongis vel subellipticis 4.5-6.5 × 2-2.5 mm, alis reticulo cellulari cellulis pentagonis instructis.
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Discussion
Type. Slope of Serra Pirapucu, alt 1300 m, Amazonas, Brazil, 26 Jan 1966, treelet 60 cm high, calyx purplish, corolla red, Nilo T. Silva & Umbelino Brazão 60898 (holotype NY; isotype VEN). VENEZUELA. Amazonas: summit, Cerro de la Neblina, locally frequent on exposed rock outcrop on south slope of Cumbre Camp Caño toward Caño Grande, alt 1500 m, 16 Jan 1954, shrub 2-4 m, buds cream, fruit reddish, Maguire, Wurdack & Bunting 37346 (paratype NY, VEN).
From Cinchona, Ladenbergia, and Remijia this genus differs in the densely villous interior of the upper part of the corolla tube and throat, the scarcely or not at all developed calyx tube, pilose cells and hispidulous-puberulent terminal appendage of the anthers, the slightly exserted and not included tips of the anthers, and the glabrous capsules. From the genus Stilpnophyllum Hook. f. of Peru, with which it shows some affinity in the densely pilose throat of the corolla, it differs, however, in the absence of a calyx tube or one scarcely developed, the triangular-lanceolate calyx lobes parted nearly to the hypanthium, the prominent glands at the base of the floral bracts and in the sinuses of the calyx lobes, the ciliate anther cells with the hispidulous-puberulent terminal appendage, combined with the peculiar dense white cellular covering of the calyx lobes, hypanthium, pedicels, outer surface of corolla tube and lobes, together with the peculiar scale-like dots intermixed with the pale network of fine cells present on the lower leaf surface in which the tertiary venation is immersed and hidden.