Monographs Details: Hyptis lanicephala Epling & C.D.Jativa
Authority: Maguire, Bassett. 1967. The botany of the Guayana Highland--Part VII. Mem. New York Bot. Gard. 17: 1-439.
Description:Species Description - Suffretux vel herba perennis praesertim in basi ramulosa altitudine ad 1 m, ramulis pilis articulatis sparse ascendenti-pilosis; foliorum laminis lineari-ob-longis, 2-6 mm latis, 2-2.5 cm longis, crenulatis, in apicc obtusis, in basi sessilibus, paulo auriculatis, pagina superiore sparse articulato-pilosa et glandulosa et minute hirtella, inferiore ut videtur glanduloso-hirtella, albida; capitulis corymbiformis albis, lanulosis, bractiis lineari-lanceolatis appressis hamatis subtentis; calycibus 5 mm longis, dentibus strictis, vix 1.5 mm longis, erectis, lanceolato-subulatis, lanulosis; corollis pallido-coeruleis; nuculis sat asperis, ovatis.
Distribution and Ecology - VENEZUELA. Bolivar: dry savanna, Rio Surapure, between mouth and Los Acietes, (35 km upstream) 80-90 m, 22 Jan 1956, Wurdack & Monachino 41337; Amazonas: Rio Negro savanna, 200 m, 5 Feb 1951, Maguire et al 31789; Serrania Yutaje, Rio Manapiare, abundant in open savanna 1 km E of Base Camp, 30 Jan 1953, Maguire & Maguire 35041 (type LA).
The specimens described above may prove to be extreme variants of H. dilatcita, a widespread species of the savanna which is represented typically as follows: Venezuela, Bolivar, Rio Paragueni, 90-100 m, 11 Dec 1955, Wurdack and Monachino 39798. The evidence is insufficient. The collections cited above, made by Maguire, are almost identical; that by Wurdack and Monachino (which is white wooly) suggests a very narrow leaved form of H. dilatata which one might expect in these regions. So far as inflorescences and calyces are concerned, Maguire’s specimens, Wurdack’s and H. dilatata scarcely differ. The nutlets of the former are not horned nor edentate. One character of Wurdack’s specimen seems to be novel in the group of Eriosphaeria of which one sees usually only the upper plant parts. At the base of each stem is a compact rosette of white wooly leaves, which doubtless are the basis of the next burst of growth. Further exploration may show that all are variants of H. dilatata, and that perhaps the two variants described below are local races. On the other hand, Wurdack’s specimen may prove to be a variant of H. lanicephala. A curious annual, 12 inches high, may represent the first year form of one of these taxa: Venezuela. Amazonas! swampy moriche savanna between Base Camp and Cerro Guanay, 26 Jan 1951, Maguire etal. 31612.