Monographs Details: Miconia neblinensis Wurdack
Authority: Maguire, Bassett. 1969. The botany of the Guayana Highland-part VIII. Mem. New York Bot. Gard. 18: 1-290.
Family:Melastomataceae
Description:Species Description - Ramuli hebeti-quadrangulati demum teretes sicut petioli foliorum subtus venae principales modice pilis erectis laevibus persistentibus 0.7-1.2(-l.5) m m longis induti et sparse caduceque stellulato-furfuracei. Petioh 0.4-0.7 cm longi; lamina 2-3 X 1.3-2 cm elliptica vel ovato-elliptica apice late acuto vel anguste obtuso (ob marginem recurvum ut videtur abrupte breviterque acuminato) basi obtusa vel rotundata, rigida et obscure ciliolato-serrulata, supra glabra, subtus in superficie glandulis minutis sparsis obsita, trinervata nervis secundariis ca 1.5 mm inter se distantibus sicut venis principalibus supra insculptis nervulis subtus laxiuscule reticulatis areolis ca 0.7 mm latis. Panicula parva 2-3 cm longa submultiflora sicut hypanthia sparsiuscule caduceque stellulato-furfuracea, axe principali sparsissime setuloso ramulis esetulosis; pedicelh ca 1 m m longi, bracteolis 1.5-2 mm longis oblanceatis ante anthesim caducis. Hypanthium (ad torum) 1.4-1.7 X 2 mm ; calycis tubus 0.1 mm longus, lobis interioribus 0.5 mm longis rotundatis ad bases remotis, dentibus exterioribus appressis non eminentibus. Petala 1.7-1.9 X 1.7-1.9 mm suborbicularia paulo emarginata glabra. Stamina paulo dimorphica glabra; filamenta 1.6-1.8 vel 1.2-1.4 m m longa; antherarum fertilium thecae 0.9 X 0.35 X 0.45 m m vel 0.7 X 0.35 X 0.45 m m late oblongae vel obovatae late (0.35 m m ) 4-porosae, connectivo paulo (0.25-0.3 m m) prolongato dorsaliter ad basim gibboso. Stigma expansum 0.6-0.8 mm diam; stylus 1.5-3.5 X 0.4 m m glaber; ovarium 3(-4)-loculare, 2/3 inferum, apice conico 0.5 m m alto glabro.

Discussion:

M . theaezanti (Bonpl.) Cogn. affinis, conjunctione foliis parvis late acutis vel anguste obtusis subtus in nervis principalibus ramuhsque modice vel dense pilis simplicibus setosis differt.

Type Collection: Bassett Maguire, J. M . Pires, & C. K. Maguire 60484 (holotype N Y ; isotypes N Y , U S ) , collected on open slopes up to cliff bases, Serra da Neblina, Amazonas, Brazil, elev 2600-2700 m, 2 Dec 1965. "Forming low masses, frequent. Petals and filaments white; calyx green

Miconia theaezans generally has larger narrowly acute to acuminate leaves esetose on the lower surfaces; sparse and principally nodal setae occur in some variants {M. rupestris Ule and some Andean material). The Brazilian M . hirtella Cogn. has much larger yellowish (in drying) leaves (blades 6-10 cm long) and smaller flowers (hypanthium plus calyx about 1.3 m m long). The Andean M . gleasoniana Wurdack, with leaves approaching in size those of the Neblina species, lacks simple hairs. Most of the branchlets of the type collection of M . neblinensis show flowers with abortive anthers and well-developed pistil; one sprig ( N Y ) however has both well-developed anthers and pistil, perhaps an indication of polygamo-dioecism. Sooty molds on the older branchlets of the Neblina material give a pseudobarbellate aspect to the persistent trichomes.