Mouriri obtusiloba Morley
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Authority
Morley, Thomas. 1976. Melastomataceae tribe Memecyleae. Fl. Neotrop. Monogr. 15: 1-295. (Published by NYBG Press)
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Family
Melastomataceae
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Scientific Name
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Type
Type. E. Oliveira 1828 (holotype, MIN; isotype, IAN). Brazil: Goiás: Igarapé Ucuricaca, region of Araguatins, flowers, 24 Aug 1961. Caules verde amarelada, pétalas amarelas em cachos ainda em botão.
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Description
Latin Diagnosis - Arbor decidua glabra 10 m alta; ramuli juvenes canaliculati et porcati. Petioli 3.0-4.0 mm longi; laminae immaturae 5.8 cm longae, 2.4 cm latae, ellipticae vel ovato-vel oblongo-ellipticae, ápice acuto, basi acuta et attenuata; superficies costae mediae canaliculata, pagina inferior rotundata vel complanata lateribus aliquanto expansis; nervi laterales manifesti in sicco. Cryptae stomatatae nullae; epidermis indivisa; hypodermis absens; sclerides terminales foliariae ignotae. Flores et folia simul geniti; inflorescentiae ad nodos ramulorum aphyllorum 2.0-5.0 mm crassorum, proxime subter folia, 1-2 in quoque later ad nodos, singulae 3-9-florae, 2.4-3.8 mm longae cum internodiis 2-3 ad bases pedicellorum sine ramulis lateralibus; bracteae 1.7-2.6 mm longae, lanceolato-triangulares, deciduae saltern sub anthesi; pedicelli 3.8-7.2 mm longi. Calyx ovarium inferior includens 4.4-4.6 mm longus; hypanthium liberum ca 1.8 mm longum; lobi calycis 1.1-1.4 mm longi, 1.5-1.9 mm lati, oblongo-triangulares, rotundati vel raro acuti, 1.6-1.8 mm longi ab staminibus. Pétala lutea, ubi immatura 4.8-5.0 mm longa, 2.7-3.0 mm lata, ovata, acuta. Antherae 3.4-3.5 mm longae; thecae 1.3-1.4 mm longae, rimis longitudinaliter dehiscentes; glándula 0.5 mm longa cum centro 0.7 mm ab ápice antherae; cauda 2.1 mm longa. Ovarium 1-loculare, placentatione centrali libera; ovula 6, ad eandem altitudinem affixa. Fructus ignotus.
Description - The epithet refers to the calyx lobes. One possible immature terminal sclereid was observed along the edge of a cleared leaf; none were noted in the interior of the lamina. Free stone cells are present only in the base of the petiole. No mucilaginous walls were observed in the epidermis.
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Discussion
The new species is primarily characterized, within its section, by its rounded oblong-triangular calyx lobes and the high position of the gland on the anther, the gland being 0.18-0.21 of the way from the apex to the base. In its relatively large flower size and short petiole it resembles M. pseudogeminata, but its short sporangium and high gland suggest M. floribunda.
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Distribution
Known only from the type locality in extreme northern Goias.
Brazil South America| Goiás Brazil South America|