Vanilla corinnae Sambin & Chiron (2017: 26)

Damián-Parizaca, Alexander & Mitidieri-Rivera, Nicole, 2023, Vanilla cameroniana (Orchidaceae, Vanilloideae), a new species from French Guiana and new records from the Guiana Shield, Phytotaxa 609 (3), pp. 222-232 : 229-230

3. Vanilla corinnae Sambin & Chiron (2017: 26) ( Figure 5 I )

Type :— FRENCH GUIANA. Cayenne : Kourou , forêt de transition entre Savane de Matiti et fleuve Kourou, March 2017, A . Sambin , G . Chiron , J . Guiard & C . Sambin 1038 (holotype: CAY225561 !; isotypes: HJBG 0049 !, LY0018955 !, LY0006937 !) .

Distribution:— French Guiana, Venezuela ( Figure 4 ).

Taxonomic Discussion:—This species is not vegetatively distinct from other V. hostmannii -like species such as V. cribbiana , V. hostmannii , and V. dressleri . However, it can be easily differentiated during flowering by its fan-shaped lip which is not as strongly trilobed as the other three species. Additionally, the rachis and sepals of this species appear to be less densely papillose than those of V. hostmannii and more similar to V. cribbiana or V. dressleri .

During an herbarium revision, numerous specimens with papillose sepals resembling V. corinnae were discovered, but unfortunately, their flowers were not well-preserved. Therefore, it was not possible to confirm whether the species is present in other countries within the Guiana Shield. However, considering that V. corinnae has been identified in Venezuela and the type material originates from French Guiana, it is probable that the species also occurs in Suriname, Guyana, and Brazil. Collecting additional specimens from these regions would greatly assist in confirming these assumptions. The following record represents the first time V. corinnae is observed outside French Guiana, extending it known geographic range.

Specimens examined:— VENEZUELA. Amazonas: Along river just below mouth of Rio Cunucunuma , 24 May 1959, J. J . Wurdack & L. S . Adderley 43170 [flower] ( US 00319617, NY01075145 , NY01075147 , P00367035 ) .

Figures

FIGURE 4. Geographic distribution of the species discussed in this study, including the limits of the Guiana Shield. The black-colored datapoints on the map represent occurrences documented in the GBIF database, while the blue-colored datapoints indicate new records reported in this study. Additionally, red datapoints represent the newly described species. The asterisk (*) is used to indicate type material.

FIGURE 5. New Vanilla records from the Guiana Shield based on herbarium material. A–F Vanilla sprucei, A–B. perianth dissection, C–D. labellum apex, E–F. column apex and anther. G–H. Vanilla dressleri, I. Vanilla corinnae. Based on Redden 2518, US (A,C,E); Redden 1843, US (B,D,F); Cremers 13016, NY (G); Wurdack 43074, US (H); and Wurdack 43170, US (I). Photographs by A. Damián.