THE ORCHID REVIEW. - 201 
O. x dellense appeared in 1891 in the collection of Baron Schréder, The 
Dell, Egham, and was described as a natural hybrid between O. Pescatorei 
and prenitens. It is, however, a heavily spotted form of O. x excellens. 
O. prenitens is an almost unknown plant with very different lip. 
In June, 1891, a hybrid flowered in the establishment of Messrs. James 
Veitch and Sons, of Chelsea, which had been raised by crossing O. 
Pescatorei with the pollen of O. triumphans, and proved absolutely 
identical with certain forms of the wild hybrid. The event was a most 
interesting one, and it is to be hoped that the parentage of other wild 
hybrids will be demonstrated in the same way. Messrs. Heath, of Chelten- 
ham, have since obtained this hybrid artificially from the same two species. 
OQ. x Harvengtense was awarded a Diploma of Honour by the Orchidéene, 
of Brussels, on February 11th last, as a supposed natural hybrid between 
O. crispum and O. sceptrum. It is, however, only a fine form of O. xX 
excellens, as the column-wings and crest and other characters of the flower 
are altogether in agreement. 
This hybrid is therefore very well known, and somewhat variable, 
though less so than some of those previously considered. Most of the 
forms approach .O. Pescatorei in shape, though one or two have the 
longer segments of O. triumphans. The majority have light yellow 
sepals and petals with a white disc, though some have the yellow much 
reduced while others are entirely suffused with it. The amount of spotting 
also varies considerably. Generally speaking, the characters of both parents 
are very easily traced. It is one of the most beautiful of the group. 
The following list shows the described forms of this hybrid, so far as I 
have been able to trace them :— 
Odontoglossum X excellens, Rchb.f. in Gard. Chron., 1881, ii. p. 4263; 1885, ii. pp. 239, 
241, fig. 51; Zhe Garden, xxi. p. 216, t. 330; Veitch Man. Orch.,i. p. 74; Rolfe in Gara. 
Chron., 1889, i. p. 650; 1891, i. p. 7543 Retchenbachia, ser. 2,1. p- 41,.t..19. 
x Brandtii, Kranzl. et Wittm. in Garzenflora, xxxviii. pp. 378, 537, t. 1308. 
O. x. stellimicans, Rchb. f. in Gard. Chron., 1884, ii. p. 680 
Var. chrysomelanum, Rchb. f. in Gard. Chron., 1888, i. p. 522. 
Var. dellense, Rolfe in Léudenia, vii. p. 97, t. 335. Odontoglossum X dellense, O’Brien 
in Gard. Chron., 1891, i. p. 521; Rolfe in Journ. des Orch., ii. p. 70. 
Var. eugenes, Rchb. f. in Gard. Chron., 1889, i. p. 522 a note); Odontoglossum xX 
eugenes, Vettch Man. Orch., i. p. 733; Orchid Album, viii. t. 355- 
Var. Harvengtense, Rolfe in Orchid Review, ii. p. 112. O. Harvengtense, L. Lind. in 
Journ. des Orch., V. p. 7. 
Var. maculatum, Rchb. f. in Gard. Chron., 1888, i. p. 522 (in note). Odontoglossum 
Vuylstekeanum maculatum, Rchb. f. /.c., 1884, ii. p. 584. 
Mm Ai kK: 
