Swartzia steyermarkii R.S.Cowan
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Authority
Cowan, Richard S. 1967. Swartzia (Leguminosae, Caesalpinioideae Swartzieae). Fl. Neotrop. Monogr. 1: 3-228. (Published by NYBG Press)
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Family
Fabaceae
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Scientific Name
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Type
Type collection. J. Steyermark 89491 (holotype US 2438237), Río Ayaiche between Puerta Lema and base of Sierra Lema, Bolívar, Venezuela, Aug. 24, 1961.
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Description
Latin Diagnosis - Arbor 4-10 m alta, ramulis piloso-velutinis; stipulae deciduae (1.5-)3-4.5 mm longae lineari-lanceolatae strigulosae; petioli teretes 5-15 mm longi velutini; rhaches 4.5-7.5(-13) cm longae, anguste alatae vel solum stipellatae in jugis foliolorum; foliola 2- vel 3-jugata, petiolulis 1-2 mm longis velutinis, laminis subcoriaceis usque coriaceis eis inferioris jugi ovalibus 5-8.5 cm longis 3-4 cm latis, eis reliquorum jugorum elliptico-oblongis 9-14 cm longis 3-7 cm latis, omnibus laminis apice abrupte et saepe hebeti-acutis usque acuminatis basi gradatim angustatis sed basi ipsa obtusis (inferioris jugi rotundatis), supra glabris pilosa costa excepta subtus glaucis et dense fulvo-pilosis, venis venulisque prominulis, supra costa impressa subtus saliente venis primariis leviter salientibus faciebus ambobus; in-florescentiae racemosae, ramuligerae 7-14 cm longae, axe pilosulo-velutino, bracteis persistentibus 2 mm longis 1.5 mm latis triangularibus extus strigulosis intus glabris, bracteolis nullis; pedicelli 4.5-7.5 mm longi, pilosulo-velutini; alabastra globosa ca 5 mm diametro pilosula; calycis segmenta 4 in fructo persistentia extus strigulosa usque pilosula intus glabra; petalum nullum; stamina maiora 2, filamentis ca 5.5 mm longis albo-villosis, antheris oblongis 2 mm longis glabris, staminibus minoribus glabris filamentis ca 5 mm longis antheris plus minusve orbicularibus ca 0.7 mm longis et latis; gynoecium albo-villosum, dorso-ventraliter compressum, ovario ovali ca 3 mm longo et 2 mm lato, gynophoro ca 2 mm longo; fructus aurantiacus ovalis 2-2.5 cm longus, 1.5 cm latus, velutinus, carpophoro 5 mm longo puniceo-velutino 1-seminato; semen ca 17 mm longum et 10 mm latum nitidum diluto-fulvum.
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Discussion
Morphologically S. steyermarkii approaches S. pilulifera but the two species are disjunct geographically; the latter is known only from southern Brazil. In addition, the new species has the larger stamens with pubescent filaments, and the leaflets of S. pilulifera are distinctly pubescent on both surfaces, at least in youth. From the geographically nearby relative of this same assemblage, S. sericea, the new species differs in its internally glabrous calyx, as well as in having fewer pairs of leaflets.
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Distribution
(Fig. 28). Rainforest at 100-1,000 m alt. in southern Venezuela.
Venezuela South America| Bolívar Venezuela South America|