ORCHIDS 



Hexisia. 



middle one lanceolate, spreading, equalling the sepals ; 

 racemes terminal, few-flowered ; peduncles short, lea\-es 

 narro\v, rather rigid. H. hideiitata is the only species 

 known in gardens, and this rccjuircs the same cultural 

 treatment as Onut/iidi?nit. 



H. bidentata {Lind/.). — In this species the bright scarlet 

 flowers arc borne in short racemes arising from the nodes; sepals 

 and petals linear, acute; \\\> narrow, obovate-oblong. heaves 

 linear-oblong, not longer than the joints. Stems jointed, con- 

 stricted at the nodes. Panama, Colombia, iSS8. (B. M., t. 7031.) 



HOLOTHRIX. 



About eighteen species of stove or greenhouse, terres- 

 trial Orchicls, of the tribe Opluydccc, go to make up 

 the genus Holotlirix (Rich.). The species are nati\-es of 

 tropical and South Africa and Madagascar. The name is 

 from liolos, whole, and tliri.\\ hair ; the stems being hair)-. 

 Flowers small, in slender, usuall)- secund spikes ; sepals 

 sometimes hair\- ; petals entire, or Aariousl)- divided at the 

 apex ; lip erect or spreading, di\-ided at the apex into from 

 three to many segments, produced at the base into a 

 spur ; scapes slender, usualh' hair\', and without sheaths. 

 Lea\'es one or two, sessile, ovate or orbicular-reniforin, 

 radical. The two species in cultivation are rarely seen 

 outside botanic collections, and require warm intermediate- 

 house treatment. 



H. Lindleyana (Rclib. /.)■ — This pretty little species bears 

 small "white flowers in racemes ; the lip is five-lobed, and has an 

 inrolled spur : the scape is slender. The leaves are ovate, and 

 spreading on the ground. South Africa, 1888. (G. C, 188S, iii., 

 365, fig- 5^'-) 



HOULLETIA. 



An epiph}'tal genus, of the tribe Vaudi\c, founded b\- 

 Brongniart, and related to Stanhopea. It is named in com- 

 pliment to the French gardener, M. Houllct. About six 

 species haxe been introduced, all from South America. 

 Thc)' ha\-c short, conical, clustering pseudo-bulbs, bearing 

 one large, plaited leaf, with a petiole of rather unusual 

 length. The flower-scapes are tall and erect, producing 



