Arachnothryx calycophylla Steyerm.
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Authority
Maguire, Bassett. 1967. The botany of the Guayana Highland--Part VII. Mem. New York Bot. Gard. 17: 1-439.
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Family
Rubiaceae
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Scientific Name
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Description
Latin Diagnosis - Frutex 2.5-4.5 m, ramis plus minusve arachnoideis; stipulis oblongo-lanceo-latis obtusis 5- 12 mm longis; foliis petiolatis, petiolis 3 - 10 mm longis alatis; laminis late elliptico-ovatis apice abrupte acuminatis vel acutis basi subacutis vel subobtusis ad 15 cm longis ad 9-11 cm latis subtus costa media nervis laterali-busque laxe villosulis superficie laxe arachnoidea, nervis lateralibus utroque latere 11-15; pedunculo 8.5-10 cm longo, inflorescentia trichotome ramosa; florium bracteis subulatis acutis 2-3 mm longis arachnoideis, calyce hypanthioque 7 mm longo, hypanthio oblongo-turbinato 1.7 mm longo 1.5 mm lato dense arachnoideo-pubescenti; calycis tubo intus glabro, lobis 4 foliaceis oblanceolatis vel late lanceolatis obtusis inaequalibus 3.5-4 mm longis 1.2-1.9 mm latis extus parce arachnoideo-pubescentibus intus glabris, inter lobos glandulis 1-2 in sinubus interpositos; corollis 14 mm longis, tubo 11.5-12.5 mm longo extus arachnoideo-pubescenti intus parte basilari 2.5 mm pubescenti deinde superne glabro, lobis 4 suborbiculari-quadratis crenulatis 3 mm longis 3.2 mm latis extus infra medium arachnoideo-pubescenti per margines glabris intus glabratis; staminibus 4 ad apicem tubi aflfixis inclusis, antheris 1.7-2 mm longis, filamentis 0.7 mm longis glabris; stylo 4.5 mm longo glabro; stimulate 1.7 mm longo; capsulis arachnoideo-pubescentibus.