82 OKCHIDE,E. [CI. 4. 



of which is either undivided or lobed. Stem fre- 

 quently little more than a Scapus, rarely climbing-. 

 Leaves alternate, entire ; the radical ones sheathing 

 and ribbed ; those of the Stem sessile, and scale-like. 

 Flowers with sheath-like Bracteas, terminal, mostly 

 spiked, rarely solitary." 



Jussieu's genera, chiefly Linnsean, are Orchis, Sa- 

 tyrium, Ophrys, fig. 70, Sei^apias, Limodorum, The- 

 lymitra Forst, Disci, Cypripedium, Bipinnula Com- 

 merson, Arethusa, Pogonia Juss., Epidendrum, and 

 Vanilla. 



Dr. Swartz and Mr. Brown have greatly improved 

 the history of this Order, and augmented its genera, 

 of which New Holland affords many new ones. From 

 the remarks of these writers I would reform Jussieu's 

 description, though by no means adopting their ideas 

 of the integuments of the Flower, which I under- 

 stand as follows. 



Calyx superior, of 3 leaves, fig. 70, a, a, a, either 

 spreading or converging ; the solitary upper one often 

 vaulted, rarely spurred at the base ; the 2 lateral ones 

 equal, sometimes combined at the bottom. Petals 

 2, b, b, ascending between the lateral and the upper- 

 most calyx-leaves, and less than either, sometimes 

 converging. Nectary, c, a lip, undivided or lobed, 

 projecting, or dependent, between the 2 lateral calyx- 

 leaves in front, often with one concave spur, rarely 2, 

 from its base behind, in which, or occasionally in a 

 chink on the, sometimes crested, disk of the lip, the 

 honey is lodged; "the lip now and then bears a 



