7- S. graveolens (Lindl. in Bot. Reg. 1840, misc. 125); 

 hypochilio subcompresso saccato intus glaberrimo antice 

 bidentato et inter dentes profunde sulcato, cpichilio 

 subrotundo-ovato integerrimo, cornubus acuminatissimis 



incurvis, columnse alis latissimis subquadratis. Peru ? 



A species with the habit of S. saccata. The sepals 



and petals are of a delicate straw colour; the lip at the 

 base, and the central parts of the flower generally are of 

 a deep rich apricot yellow, while the horns and upper 

 end of the lip are like ivory turning yellow. Its odour 

 is so powerful that it communicates itself to the fingers 

 after touching the flowers, and like many other smells, 

 though agreeable in itself, is offensive from its intensity. 

 These remarks are borrowed from the notice formerly 

 given of the plant in the Botanical Register, for by some 

 accident neither drawing nor specimen were preserved 

 of the species. 



8. S. guadricornis (Lindl. in Bot. Reg. 1838, t.5.); hypo- 



chilio oblongo basi bicorni antice saccato apice carnoso 

 excavato mutico, epichilio ovato integro ajquali, cornubus 



incurvis teretibus brevioribus, columna late alata. 



Central America. This has something the appearance 



of S. oculata; but its lip has a rich crimson stain at the 

 base, instead of a pair of deep brown spots, and it has 

 two prominent horns standing erect on the lower edge of 

 the cavity of the hypochilium. This brings the species 

 near S. eburnea, which is however very different in other 

 respects. It is one of the finest of the genus. 



9. S. eburnea (Lindl. in Bot. Reg. t. 1529. Gen. & Sp. no. 4. 



Bot. Mag. t. 3359. 8. grandiflora, Lindl. 1. c. no. 3. 

 Ceratochilus grandiflorus, Lodd. Bot. Cab. t. 1414.); 

 labello oblongo vix medio constricto, hypochilio pone 

 basin bicorni, epichilio ovato-oblongo obtuso, metachilio 

 duplo longiore solido plano-convexo antice truncate 

 bidentato, columna longissima apice tantum late alata.— 



Brazil and Trinidad. This very distinct and beau- 



tiful plant always has the sepals and petals pure ivory 

 white; but in the colour of its lip it vanes, sometimes 

 being nearly colourless, except in the cavity of the hypo- 

 chilium, which is crimson, and occasionally having deep 

 rich purple stains all over the lip, except the middle lobe. 

 Flowers extremely sweet. 



