Tibouchina campii Wurdack
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Authority
Wurdack, John J. 1967. Plants collected in Ecuador by W. H. Camp. Melastomataceae. Mem. New York Bot. Gard. 16: 1-45.
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Family
Melastomataceae
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Scientific Name
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Description
Latin Diagnosis - T. stenophyllae Cogn. affinis sed foliis crassioribus staminum connectivis breviter prolongatis. Suffrutex usque ad 50 cm altus; rami primum modice appresso-setulosi demum longo-strigulosi pilis laevibus primum plerumque glanduliferis glandulis demum deciduis. Petioli 0.4-0.7 cm longi dense strigulosi; lamina 1.8-4 X 0.5-1 cm rigidiuscula elliptico-lanceolata ápice anguste acuto basi anguste vel late acuta, trinervata nervis lateralibus usque ad basim liberis nervis secundariis tertiariisque supra invisis subtus obscure evolutis margine obscure serrulata, supra et subtus sparse longo-strigulosa vel brevi-strigosa pilis gracilibus supra ca. 1/3 adnatis. Panícula usque ad 7 cm longa ramis pedicellisque adscendentibus sicut hypanthiis modice glanduloso-setulosis; pedicelli 2-5 mm longi ad basim bibrac-teolati bracteolis 1.5-2 mm longis elliptico-ovatis setulosis valde caducis. Hypan-thium 2.3 mm longum; calycis tubus 0.1-0.2 mm altus, lobis 2 x 1-5 mm trian-gularibus margine ciliolato. Stamina vix dimorphica glabra; filamenta 3.9 vel 3.2 mm; antherarum thecae 2.5-2.6 vel 2.2 mm anguste oblongae et vix subulatae ápice ventraliter minute uni poroso, connectivo ad basim 0.1 vel 0.3 mm prolon-gato et ventraliter crasse bilobulato. Stylus 6 X 0.4 mm glaber; stigma puncti-forme; ovarium apicem versus sparse setulosum et ad apicem ipsem circum stylum setulis ca. 20 et 0.3-0.5 mm longis coronatum.
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Discussion
Of the observable flowers, 22 were 4-merous and 15 were 5-merous. Insects had chewed the anther tips on most flowers, but the anthers are definitely not truncate. The general aspect of T campii is like that of Pterolepis trichotoma (Rottb.) Cogn. but there is no trace of penicillate hypanthial hairs, nor is there any suggested affinity with the species of Pterolepis lacking such hairs. The suggested Bolivian relative has quite dissimilar stamen connectives as well as very thin leaves and non-glandular young stem hairs. Another possible relative, T. stenopetala Cogn., has definitely 5-nerved leaves and shorter calyx lobes. If the 4-merous flowers of T. campii would impel placement in sect. Pseudopterolepis Cogn. (where T. longipilosa Cogn. shows similar flower-mery fluctuation), no close relative would be apparent; such glandular-pubescent species as T. herbacea (DC.) Cogn. have 5-nerved leaves.
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Distribution
Type Collection: W. H. Camp E-1546 (holotype US 2404692; isotype NY; 1 additional isotype to be distributed), collected between Tres Ranchos and Chon-tal on the trail from Sevilla de Oro to Mendez, valley of the Ríos Negro and Chupianza, Prov. Santiago-Zamora, Ecuador, elev. 800-1700 m, 15 Dec. 1944. “Buds lavender-pink; flowers white".
Amazonas Ecuador South America|