Tap. 7523, 
HOLOTHRIX ORTHOCERAS. 
Native of South Africa. 
Nat. Ord. Orcu1pEz.—Tribe OPpHRYDER, 
Genus Honoturix, Rich.; (Benth. & Hook. f. Gen. Plant. vol. iii. p. 6238.) 
Hororurix orthoceras; foliis 2 sessilibus ovatis orbicularibus cordatisve 
patenti-recurvis supra luride viridibus nervis albidis trabeculatis, scapo 
ovarioque piloso apice multifloro, floribus subsecundis, bracteis ovato-lan- 
ceolatis ovarium subequantibus, sepalis erectis ovato-lanceolatis acumi- 
natis glaberrimis, lateralibus basi labello adnatis, petalis erectis quam 
sepala ter longioribus lanceolatis caudato-acuminatis puberulis, labelli 
ampli puberuli lobis lateralibus parvis obtusis recurvis, terminali sub- 
quadrato antice truncato 3-5-dentato, dentibus obtusis intermedio paullo 
longiore, calcare limbo # uilongo v. breviore gracili stricto, columna 
brevissima, anthera hemispherica. 
HH. orthoceras, Reichb. f. Otia Bot. Hamburg. p. 119. 
Tryphia orthoceras, Harv. Thes. Cap. vol. ii. p. 14, t. 105. 
The genus Holothriz, now for the first time figured in 
this magazine, is a large South African one, containing 
about thirty known species, a few of which are tropical 
African, three having been found as far north as Abyssinia. 
Mr. Bolus in his “ Orchids of the Cape Peninsula” (p. 113) 
describes six as natives of that region. 4H. orthoceras is 
closely allied to H. Lindleyana, Reichb., also a native of 
Eastern South Africa, which differs, amongst other 
characters, in the involute spur. There is a good sketch 
of a clump of H. Lindleyana in the Gardener's Chronicle, 
1888, vol. i. fig. 55, 56. 
In the above mentioned work Mr. Bolus describes the 
petals and lip of Holothriz as always glabrous, but they 
are decidedly, though very minutely, puberulous in H. 
orthoceras. : 
H. orthoceras, though not hitherto found in the Cape 
Peninsula, has a wide distribution in South Africa, froin 
the South Western districts of Uitenhage and Albany, 
northward to Natal and the Transvaal, whence tubers 
were presented to the Royal Gardens, Kew, by Mrs. Deglon 
of Barberton. These were received in June, 1895, im- 
Mazcu Isv, 1897. 
