VI GLOSSARY OF TECHNICAL TERMS. 



Thyrsus, Thyrsoid, a racpino of oval shape of which the central pedicels 

 are a little longer tlian the outer ones. This form of inflorescence occurs 

 in Dendrohium densiflonan, D. Farnieri, D. fJiyrsiJIonoii and allied species. 



Tomentosa, covered with short matted hairs. 



Tridentate, terminating in three teeth. 



Trigonal, three-angled. 



Triquetral, three-edged. 



Truncate, terminating aliruptly, as if a piece had been cut o(f. 



Trapeziform, having four sides, but the opposite sides not jiarallel nor the 

 opposite angles equal. 



Umbel, an inflorescence in which the pedicels or secondary axes spring from 

 the same point in the peduncle or primary axis and diverge like the rays 

 of a parasol. The umbel and semi-umbel occur in Cirrhopetalum, Bulbo- 

 phyllum and a few others. 



Unguiculate, applied to floral segments when the blade or limb is narrowed 

 at the base into a short petiole or claw. 



Ventricose, bulging or swelling out as the disk of the labellum of Cycnoches 

 cJdowchilun. 



