SUPPLEMENT. 581 
Opuntia—continued. | ORCHIS. The British Flora embraces nine species. 
To those described on pp. 520-1, Vol. IL., the following 
| varieties should now be added: 
©. longicruris foliis-maculatis (spotted-leaved). In this 
variety the leaves are marked with large, irregular, brownish- 
purple blotches. 1884. (R. G. 1149, f. 3, under name of 
O. undulatifolia foliis-maculatis.) 
O. maculata superba (superb). fl. rich 
mauve, spotted and blotched purple; spikes 
dense, about 1ft. iong. May and June. 
i. dark green, spotted purple. kh. 1sft. A 
fine yariety. 
ORIXA. Included under Celastrus 
(which see). 
ORNITHIDIUM. To the species 
described on p. 524, Vol. II., the follow- 
ing should now be added: 
O, ochraceum (ochre). jl. very small; sepals 
and petals ochre, with a few mauve-purple 
spots, ligulate, acute; lip white, the disk 
of the anterior lacinia ochre, spotted mauve. 
1. cuneate-oblong, unequally acuminate, car- 
tilaginous. Pseudo-bulbs elliptical, an- 
cipitous. New Grenada, 1887. 
Fig. 51, Roors OF OPUNTIA MACRORHIZ\. 
O. filipendula (drooping-threaded). fl, pur- 
plish, 2}in. in diameter, very handsome. 
May and June. Stems about lft. high, 
spreading ; joints flat, round or oval, about 
3in. long, oft n less, bluish - glaucous ; 
cushions fin. apart, composed of a little 
tuft of white, woolly bair, and a cluster of 
erect, rather strong bristles ; spines usually 
one to each cushion, slender, deflexed, 
white, lin. to 2in. long, but absent from 
some joints. Mexico. Stove. See Fig. 49. 
O. macrorhiza (large-rooted). /. yellow, 
large and beautiful. Summer. Stems cy- 
lindrical at maturity; joints flattened, 
battledore - like, with deciduous spines 
longer than the tufted bristles on the 
stems, the newly-developed joints having 
small leaves ; roots thick and fleshy, having 
the appearance of potatoes, and supposed 
to be edible. Texas. This species resem- 
bles O. Rajinesquii. See Figs. 50 and 51 
O. rosea (rosy). jl. bright rose, 2in. across, 
borne on the ends of the ripened growths 
of the year, usually clustered. June. 
Stem erect, freely branching; joints 2in. 
to 6in. long, cylindrical; tubercles ridge- 
like, bearing on their points small cushions 
of very fine bristles, and tufts of pale 
yellowish spines about jin. long, all point- 
ing upwards. Brazil. A distinct and hand- 
some, but rare species. See Fig. 52. 
ORCHIDANTHA (from Orchis, 
an Orchid, and anthos, a flower; in 
allusion to the Orchid-like appearance 
of the flowers). Orn. Scitaminew. A 
monotypic genus. The species is a 
very remarkable and interesting, stove, 
perennial herb, resembling a dwarf 
Heliconia in foliage. but with flowers 
like those of an Orchid. For culture, 
see Heliconia, on p. 128, Vol. II. 
O, borneénsis (Bornean). fl. produced in 
short spikes close to the ground ; sepals 
yellowish at base, purplish towards the 
apex, narrow linear-lanceolate, acute, lin. 
long; petals blackish-violet, linear, obtuse, 
aristate, rather more than jin. long ; lip 
blackish-violet, linear, acuminate, lin. long ; 
stamens five. J. elliptic-oblong, acuminate, 
bright green, 6in. to 8in. long, 24in. to 3in. 
broad ; petioles 5in. to 10in. long. Borneo, 
1886. 
Fic, 52. PORTION OF FLOWERING PLANT OF OPUNTIA ROSEA, 
