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Gonzalagunia thyrsoidea (Donn. Sm.) B.L. Rob. Search in The Plant ListSearch in IPNISearch in Australian Plant Name IndexSearch in NYBG Virtual HerbariumSearch in Muséum national d'Histoire naturelleSearch in Type Specimen Register of the U.S. National HerbariumSearch in Virtual Herbaria AustriaSearch in JSTOR Plant ScienceSearch in SEINetSearch in African Plants Database at Geneva Botanical GardenAfrican Plants, Senckenberg Photo GallerySearch in Flora do Brasil 2020Search in Reflora - Virtual HerbariumSearch in Living Collections Decrease font Increase font Restore font
 

Published In: Proceedings of the American Academy of Arts and Sciences 45(17): 405. 1910. (Proc. Amer. Acad. Arts) Name publication detailView in Biodiversity Heritage Library
 

Project Name Data (Last Modified On 12/6/2016)
Acceptance : Accepted
Project Data     (Last Modified On 12/6/2016)
Notes:

This species is characterized by its shrub or small tree habit, stems with spreading hirsute to villosulous pubescence, thin-textured leaves generally elliptic leaves, flowers borne in groups that are subsessile or on short secondary axes along the primary axis, white corollas with tubes 12-20 mm long, and oblate fruits with four ovary locules. This species is documented by various fruiting collections but the fruit color has not been noted. The corolla tubes are sometimes slenderly funnelform, in contrast to most species of Gonzalagunia in which the corolla tubes are cylindrical. The inflorescence characteristically bears linear bracts subtending each group of flowers or reduced secondary axis, with these bracts short to well developed and usually deciduous as the fruits develop.

Gonzalagunia thyrsoidea is circumscribed here to include a range of pubescence on the undersurfaces of the leaves that varies continuously from sparsely strigillose to almost glabrescent (as in the type of Gonzalagunia rojasii), to moderately strigillose or strigose on the veins and sparsely to moderately sericeous on the blade portion (as in the type of Gonzalagunia thyrsoidea), to densely strigose and densely appressed-sericeous on the blade portion (as in the type of Gonzalagunia tacanensis). The pubescence on the veins of the leaf undersides often is initially appressed and then becomes spreading and hispid with age, and also all of the pubescence of the leaf undersides is deciduous. This circumscription is somewhat different here than that of Lorence (1999) and Taylor (in Lorence et al., 2012), where the densely sericeous-hispid leaves of Gonzalagunia tacanensis were grouped with the tomentose-sericeous leaves of Gonzalagunia chiapasensis; instead it follows Borhidi (2012). The calyx limb of Gonzalagunia thyrsoidea as circumscribed here varies from subtruncate to lobed for about half its length, with the lobes obtuse to acute. The corolla tubes of this species in this circumscription are 12-21 mm long.

Gonzalagunia thyrsoidea is similar to Gonzalagunia rosea of Costa Rica through northern Colombia, which has appressed pubescence and pink generally smaller corollas, with tubes 8-16 mm long. Gonzalagunia thyrsoidea is also similar to Gonzalagunia chiapasensis, which has white densely floccose or lanose pubescence on the undersides of the leaves and corolla tubes 8-12 mm long.

Distribution: Humid to wet forest at 500-1600 m, Southern Mexico and Guatemala.

 


 

 
 
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