A AW THEIR MANAGEMENT. 351 



Odontoglossum. 



little shading even in summer, and after its new pseudo-bulbs 

 have ripened it should be kept quite dry till the iVesh flower- 

 scapes are visible in the apex of the new growth. l"he pseudo- 

 bulbs are smooth, and shining light green. The leaves are thick, 

 and darker in colour. The flowers, which are about 3in. across, 

 and full in outline, are sometimes pure white, and sometimes (as 

 m var. roseiD/i) beautifully suffused with rose ; they are borne on 

 pendulous racemes, appearing about the months of jMay and June, 

 and remaining in full beauty for three or four weeks. From 

 fifteen to thirty flowers, which are delicately lemon-scented, are 

 produced in each raceme. The lip has a long claw, and is 

 suddenly expanded mto a broad, kidney-shaped blade. Unlike 

 all other species, this pushes its flower-spike along with the new 

 growth, the former usually appearing when the latter is about 

 2in. long. It is also exceptional in having pendiflous racemes. 

 Introduced from iSIexico m 1840. (Batem. Monog., t. 6.) 



A'ar. album has flowers wholly white, except the yellow crest 

 on the base of the lip. 



A\ar. piitictaiiim has rosy flowers, dotted with purple. 

 A\ar. roiatm has a deep rose-coloured blade to the lip. 

 O. constrictum (Li/id/.). — A pretty, free-flowering species. 

 Pseudo-bulbs ovoid, compressed, dark green. Sepals and petals 

 bright yellow, with orange-brown blotches and bars ; lip fiddle- 

 formed, white, tipped with yellow, and bearing two conspicuous 

 rose-coloured spots near the centre ; panicles large, branched, 

 many-flowered. Leaves elongate, linear-lanceolate. Venezuela, 

 1S43. (B. M,, t. 5736.) 



O. cordatum (Lindl.). — Pseudo-bulbs ovoid, compressed, 

 shining green, each bearing a leaf 6in. to 8in. long. Scape 

 erect, simple or branched, bearing few or many handsome 

 flowers. Sepals and petals yellow, blotched and barred with 

 deep rich chocolate-brown ; they are very much elongated and 

 curiously wavy, and the sepals are keeled behind. The lip is 

 large and heart-shaped (whence the specific name), with a long, 

 pointed apex ; its ground-colour is white, blotched with lilac 

 and purplish-red, or soinetimes with pale yellow and crimson. 

 This species blooms during late spring and early summer. 

 Guatemala and .Mexico, 1837. (B. M., t. 4847, as O. macu- 

 latnm ; the true maculatuni is a different plant ) 



Yar. sulpkureiim.—iit\)a.h and petals sulphur-yellow ; lip white, 

 with sulphur tips and blotches. 



O. -coronarium (Lindl.).— One of the most attractive species 

 when in bloom, but unfortunately rather difficult to manage 

 successfully. It has a long, creeping rhizome, bearing ovoid, 



