NOMENCLATORIAL NOTES. IX 
BY 
Charles Schweinfurth 
Spiranthes guyanensis (Lindl.) Cogniaux in 
Martins FI. Bras. 3, pt. 4 (1895) 209, t. 47, fig. 2. 
Goodyera guyanensis Lindley Gen. & Sp. Orch. PI. 
(1840) 494. 
Spiranthes aguacatensis Reichenbach filius in Bonpl. 
3 (1855) 214. 
Spiranthes Hostmanni Reichenbach filius ex Grise- 
bach FI. Brit. W. Ind. (1864) 640. 
Gyrostachys aguacatensis O.Kuntze Rev. Gen. PI. 
2 (1891) 664. 
Gyrostachys Hostmannii O.Kuntze Rev. Gen. PI. 2 
(1891) 664. 
Spiranthes Brenesii Schlechter in Fedde Repert. 10 
(1912) 481. 
Brachystele aguacatensis Schlechter in Beihefte Bot. 
Centralbl. 37, Abt. 2 (1920) 371. 
Brachystele guyanensis Schlechter in Beihefte Bot. 
Centralbl. 37, Abt. 2 (1920) 373. 
Judging from a drawing of the type of Spiranthes 
aguacatensis from the Reichenbach Herbarium at Vienna 
and from the plate of Spiranthes guyanensis above cited, 
it appears that these concepts are inseparable. Great var¬ 
iability in respect to size and stoutness of plant and length 
of the raceme is shown by various collections from Cen¬ 
tral America, at altitudes of 3000 ft. or more, which have 
been referred to Spiranthes aguacatensis. Moreover, a 
series of specimens (two collections) from Trinidad at a 
low elevation appear to consist of generally more slender 
plants with less conspicuous and flaring cauline sheaths 
than much of the Central American material. 
As here comprehended, Spiranthes guyanensis ex- 
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