Tab. 8678. 

 ACACALLIS cyanea. 



Upper Amazon. 



Orchidaceae. Tribe Yandeae. 

 Acacallis, Lindl. ; BentJi. et Hook. f. Gen. Plant, vol. iii. p. 544. 



Acacallis eyanea, Lindl. Fol. Orch.Acacal. p. 1 ; Veitch, Man. Orch. pars ix. 

 p. 70 ; Cogn. in Mart. Fl. Bras. vol. iii. pars v. p. 524 ; Bolfe in Orch. 

 Bev. 1907, p. 40 ; species unica. 



Herba epiphytica. Bhizoma lignosum, repens, radicans, vaginis imbricatis 

 vestitum. Pseudobulbi parvi, paullo incrassati, monophylli. Folia 

 petiolata, obovato-elliptica, acuminata, subplicata, 20-25 cm. longa, 3-8 cm. 

 lata. Scapi 15-20 cm. longi, vaginis paucis vestiti ; racemi pauci-multi- 

 flori ; bracteae ovato-oblongae, acutae, 0'8-l cm. longae ; pedicelli 2 cm. 

 longi. Flores speciosi, expansi. Sepala obovata, subacuta, concava, 

 2"5 cm. longa. Petala orbiculari-obovata, 2*5-3 cm. lata. Labcllum 

 unguiculatum, erecto -patens ; limbus reniformi-obovatus, emarginatus, 

 undulatus, 2 • 5-2 "8 cm. latus, basi concavus ; discus basi late cristatus ; 

 crista striata, apice fimbriato-dentata. Columna brevis, suberecta, 1 cm. 

 longa, basi in pedem brevem producta ; alae rotundato-oblongae ; pollinia 4, 

 pyriformia; stipes planus, obovato-oblongus; glandula rotundata. — Aganisia 

 eyanea, Eeichb. f. Beitr. Orch. p. 13, t. 4, et in Nov. Act. Acad. Nat. Cur. 

 vol. xxxv. n. 2, t. 4 ; Lindenia, vol. iii. t. 110. A. coerulea, Eeichb. f. in 

 Gard. Chron. 1886, vol. xxv. p. 720 ; Williams, Orch. Alb. vol. viii. t. 374 ; 

 Bev. Hort. 1898, p. 432, cum icon. A. tricolor, N. E. Br. in Lindenia, 

 vol. i. t. 45. Kochiophyton negrense, Schlechter ex Cogn. in Mart. Fl. 

 Bras. vol. iii. pars vi. p. 574, t. 119. — B. A. Eolfe. 



This striking Orchid is a native of the upper Amazon 

 region, where it was first met with by the late Dr. R. 

 Spruce, growing on trees near forest streams at Barra 

 on the Rio Negro in July, 1851, and a little later at the 

 Secus cataract, near Panure, on the Rio Uapes. It was 

 described by Lindley from Spruce's specimens as a new 

 genus nearly related to Warrea, Lindl, and to Huntley a, 

 Batem., the latter allied if not reducible to Zygopetalum, 

 Hook. From both, however, it is readily distinguished 

 both by structure and by habit. The account by Spruce 

 of the beauty of Acacallis led to a desire to introduce 

 the plant, the fulfilment of which was not accomplished 

 until, in 1883, an example obtained by Mr. Morris, a 

 collector in the service of Mr. E. Corning, Kenwood, 

 Albany County, New York, came into flower. According 



September, 1916. 



