Ixxiv GENERA. 



Tribe V. XERANTHEME^. 



502. XERAISTTHEMITM. Discoid. Outer Row of 2-3-cleft styliferous but unproduc- 

 tive Fits. Phyll. free, tiled. Recept. cliaffy. Seeds top-shaped. Crest of 5-7 awns to Fits. 

 of disc, p, 235. 



Order V. CAZiBNDUIiACK.ffi. 



503. CALENDULA. Fits, of Ray ligulate, fertile; of Disc barren. Recept. naked. 

 Stigma of radiant Fits, deeply divided ; of Disc nearly entire. Seeds beaked. Crest none. p. 235. 



XX. GYNANDEIA. 

 I. MONANDRIA. Orchide^. 



In this Order the Cells of the Anther are so detached as to give the appearance of two An- 

 thers. Flowers ringent. Outer circle of 3 sepals ; inner of 2 petals and a nectary, which, ex- 

 cept in Herminium and Malaxis, differs materially in form from the petals. 



A. Masses of Pollen divided into grains connected by an elastic substance. 

 i. Nectary with a spur. 



758. LIMODOEUM. Label of Nect. undivided. Anther terminal, free. Plant purplish- 

 brown, without L. Bxjot a bundle of fleshy fibres, p. 349. 



759. EPIPOGIUM. Masses of PoUen ending in a solid, subulate point. Column hollowed 

 in front, dilated upwards. Spur inflated. Germen not twisted. Scales sheathing ; no L. Root 

 branched, fleshy, p. 349. 



760. OKCHIS. Masses of Pollen rounded at end, placed in two, distinct, vertical cells. 

 Spur not inflated. Germen twisted. Tubers 2, rounded or palmate, p. 349. 



ii. No posterior Bag or Spur to the Nectary. 



761. ACEBAS. Masses of Pollen connected under one hood. Label flat. Sep. converging. 

 Tubers of Root undivided, p. 353. 



762. OPHE-YS. Label convex ; of 2 or 4 lobes, often not very distinct, and a small cen- 

 tral divison, sometimes wanting. Cal. spreading (except in 0. alpina). Tubers of Root rounded. 

 p. 353. 



763. SESAPIAS. Label with a callus at base ; middle Segm. largest, acute, flat; lateral 

 erect. Sep. and Pet. erect, acuminate. Tubers rounded, p. 355. 



767. HERMIDSTIUM. Pet. 3-lobed, acute, nearly resembling the obtusely keeled nec- 

 tary. Second Tuber distant, p. 355. 



B. Pollen powdery. 

 i. No Bag or Spur to the Nectary. 



764. GOODYERA. Nect. hollowed at the base. Sep. spreading. Pet. convergent. 

 Column without wings. Fl. spirally disposed. Root creeping, p. 355. 



765. SPIRAN'THES. Label channeled. Base embraced by the converging calyx. Pet. 

 porrect. Column without wings. Tubers elongated, often more than two. p. 355. 



766. NEOTTIA. Nect. somewhat hoUowed at base, 2-lobed. Beak of Stigma entire, 

 without an appendage. Perianth forming a hood. Plant brown, leafless. Root of numerous 

 fleshy fibres or tubers, p. 355. 



768. LISTEKA. Label flat. Cal. and Pet. hardly spreading, nearly similar. Ahther 

 sessile. Column without wings. Root a bundle of somewhat fleshy fibres, p. 355. 



