62 ZYGOPETALUM. 



From these notes it appears to be spread over tlie littoral region 



of Guiana^ always in shade in proximity to water. The specific 



name rostratum, "beaked," refers to the beak-like prolongation at 

 the apex of the column. 



Z. stapelioides. 



Pseudo-bulbs about the size of a filbert, compressed, with a rib on 

 each of tlie flattened sides, di-triphyllous. Leaves broadly lanceolate, 

 acute, 3 — 4 inches long, greyish green. Scapes spreading or sub- 

 pendulous, as long as the leaves, 1 — 2 flowered; bracts small, ovate, 

 acute, sheathing. Flowers 1| — 2 inches in diameter; sepals and petals 

 ovate-oblong, acute, keeled at the back, pale green spotted and barred 

 with brown-purple, the petals a little broader and more densely spotted 

 than the sepals ; lip three-lobcd, the side lobes roundish oblong, erect, 

 coloured like the sepals ; the intermediate lobe orbicular, concave, lurid 

 purple, sometimes freckled witli light yellow ; crest a semi-lunate plate 

 with a broad raised keel at the middle. Column semi-terete, pale 

 green ; rostellum beaked. 



Zygopetalum stapelioides, Kchb. in Walp. Ann. VI. p. 658 (1863). Maxillaria 

 stapelioides, Lindl. Gen. et Sp. Orch. p. 146 (1832). Id. in BoL Reg. 1839, t. 17. 

 Bot. Mac/, t. 3877. Promeneea stapelioidps, Lindl. in Bot. Eeg. 1813, misc. p. 13. 



A dwarf species first detected by Herr Link_, Director of the 



Botanic Garden at Berlin, during a mission to Brazil some time 



prior to 1830. It was afterwards gathered by Gardner on the 



Organ Mountains near Eio de Janeiro, by whom it was introduced 



into British gardens, where it is best known under the name of 



Promencea stapelioides. The specific name refers to the Stapelia-like 



spotting of the flowers. 



Z. Wailesianum. 



Pseudo-bulbs none. Leaves linear or linear-lanceolate, acute, 6 — 8 



inches long. Peduncles half as long as the leaves, one-flowered ; bracts 



sub-triangular, acute, sheathing. Flowers 1| — 2 inches in diameter, 



white Avith a violet-blue disk on the lip, the crest of which is also 



marked with violet-blue lines ; sepals and petals similar, ovate-lanceolate, 



acute ; lip broadly obcordate or sub-quadrate, cuneate at the base, 



obscurely lobed, the basal lobes small and incurved ; crest semi-lunate 



with five keels terminating in front in as many projecting teeth. 



Column triquetral, arched. 



Zygopetalum Wailesianum, Echb. in Walp. Ann. VI. p. 656 (1863). Id. Xe7i. 

 Orch. III. p. 50, t. 222 (very poor). Warrea Wailesiana, Lindl. in Journ. Hort. Soc. 

 IV. p. 264 (1849). Id. in Paxt. Fl. Gard. I. p. 73, icon xyl. 



One of the discoveries of Gardner in southern Brazil during an 



