pointed by the Sixth International Botanical Congress, 
Amsterdam, 1935. (Cf. Kew Bull. (1940) 86, 95.) 
It is unfortunate that the name was conserved with 
the original spelling. Arachnitis is a medical term and 
does not mean “‘spider-like’*? as Philippi obviously in- 
tended. Philippi himself in a later paper changed the 
spelling to Arachnites,—and was followed by Bentham 
and Hooker in the Genera Plantarum and by Engler 
in Die natiirlichen Pflanzenfamilien. Inasmuch as 4 rach- 
nitis was conserved over Arachnites, the two being con- 
sidered orthographic variants, the orthographically cor- 
rect spelling should have been adopted. 
Philippi ascribed his Arachnitis to the Orchidaceae 
but apparently with some doubt, for he wrote: ‘‘Ich 
habe mich gefragt, ob die Blume vielleicht verdreht, 
und ob dieses Blittchen das Labellum wiire. aber es ge- 
hoért bestimmt der dusseren Reihe des Perigons an, und 
hat auch derbe Kelchstruktur. ”’ 
Arachnitis is a monotypic genus of the New World. 
Arachnitis uniflora Philippi in Bot. Zeit. 22 
(1864) A ly 
ARGENTINA: Nothofagus woods, Llao Llao, Parque Nacional de Na- 
huel Huapi, Hunnewell 15928 (Gray Herb.); saprophytic on humus, 
deep shade of Nothofagus, north bank of Lago Rico, southwest branch 
of Lago Argentino, Glacier National Park, Gob. Santa Cruz, Depto. 
Lago Argentino, alt. 270 m., January 12, 1939, Eyerdam, Beetle & 
Grondona 24326 (Gray Herb.); beech forest at Puerto Nuevo, Lago 
Nahuel Huapi, alt. 770 m., December 30, 1933, Ljungner 599 (Herb. 
N.Y. Bot. Gard.). 
Cuite: Valdivia, Philippi, (U.S. Nat. Herb.); Prov. Magellanes, 
alt. ca. 200 m., January 1931, Hicken 424 (Gray Herb.). 
EXPLANATION OF THE ILLUSTRATION 
Pirate XXIV. Corsra purpurata L.Wms. 1, habit, natural size. 2, 
dorsal sepal, twice natural size. 3, flower with dorsal sepal removed, 
three times natural size. 4, anther, ten times natural size. 
Corsta acuminata L. Wms. 5, habit, natural size. 6, style and fila- 
ments, five times natural size. 7, petal, three times natural size. 
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