ORCHIDACE.E 



branched above the fusiform basal thickening. Labellum 1.4 cm. long, 

 three-lobed. 



3. D. philippinense Ames. Leaves terete, 6 cm. long. Labellum entire, 

 oblong-elliptic. 



4. D. planibulbe Lindl. Leaves about 4 cm. long, 5 mm. wide. Labellum 

 with a conspicuous three-toothed callus at the base of the middle lobe. 



5. D. polytrichum Ames. Leaves terete, 1 dm. long. Labellum deeply 

 fringed on the middle lobe. 



6. D. Robinsonii Ames. Leaves 5 cm. long, about 2 mm. wide. Labellum 

 obscurely three-lobed. 



7. D. Usteri Schltr. 

 *8. D. Usterioides Ames. 



14. §Strongyle. This is an artificial group, which is distin- 

 guished by unthickened stems and terete or awl-shaped acute 

 leaves. Probably best joined with % Aporum. 



1. D. mindanaense Ames. 



2. D. marivelense Ames Orchid ace,e 2 : 180. D. parciflorum Krdnzl. non 

 Reichb.f. 



15. § Aporum. The flowers arise from a cushion of fibrous scales 

 and are often at the nodes of the stem opposite rudimentary 

 leaves. 



1. D. albayense Ames. 



2. D. basilanense Ames. 



S. D. distichum Reichb.f. 

 *4. D. Escritorii Ames. 



5. D. lunatum Lindl. 



6. D. McGregorii Ames. 



7. D. Merrillii Ames. 



8. D. ventricosum Krdnzl. 

 * 9. D. Wenzelii Ames. 



D. Escritorii and D. ventricosum are, as it were, transitional forms be- 

 tween § Rhopalanthe and § Aporum. They suggest D. Macfarlanei 

 Mull., but the stems are not at all thickened at base. 



16. § Oxystophyllum. In this section the flowers are sub- 



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