GENERA. lAxv 



769. EPIPACTIS. Nect. deeply hollowed at base, contracted in the middle; the upper 

 part undivided. Anther terminal. Root somewhat creeping, with fleshy fibres, p. 355, 



O. Pollen at last waxy ; in four masses. 



770. CORALLORHIZA. Lower Sep. united at base with the nectary. Nect. 3-lobed ; 

 lateral Lobes small ; middle with 2 prominent ridges at base. Root much hranched, fleshy. 

 p. 356. 



771. LIPARIS. Sep. free. Neet. channeled, sessile at base of column, entire, much 

 broader than the sepals. Anther a deciduous lid. Base of Stem somewhat bulbous. Root 

 fibrous, p. 356. 



772. MALAXIS. Sep. free. Nect. embracing base of column, entire, resembling the 

 sepals. Anther sessile, terminal, persistent. Germcu not twisted. Base of Stem often some- 

 what bulbous, p. 356. 



II. DIANDRIA. 0KCHIDEJ5. 



773. CYPEIPEDIUM. Nect. inflated. Column with a terminal dilated appendage 

 {apice trifldum, Koch). Cal, and Pet. spreading. (Germeu not twisted, Koch.) p. 356. 



III. HEXANDRIA. Aristolochm. 



711. ARISTOIiOCHIA. Cal. of I L., superior, bellying at base. Cor. 0. Stigma with 

 6 lobes. Caps, with 6 cells and many seeds. L. alternate, deeply cordate, p. 324. 



XXI. MONCECIA. 



Sprengel forms the first order of Monoecia, of plants which have the barren and fertile flowers 

 on the same receptacle. This arrangement has some advantages, as the number of stamens is often 

 uncertain ; but it is not always clear whether the flowers should be considered as growing on a 

 common receptacle, or merely as forming a spike. He includes in it Calla, Arum, Eriocaulon, 

 Ficus, and Euphorbia. 



I. MONANDRIA. 



718. EUPHORBIA. 11. without Cal. or Cor., the barren suiTounding a fertile one on a 

 stalked germen ; the whole included in a common involucrum. Styles 3, cloven. Caps. 3- 

 hunched. Plants abounding in a milky juice. L. scattered, undivided. Euphoebiace^. 

 p. 325. 



709. CYNOMORIUM. Barren and Fertile Fl. in a common amentum. Scales peltate, 

 with chaff intermixed. Barren. Cal. embracing the base of the single stamen. Fertile. Gei-men 

 crowned with a one-sided scale. Style 1. Stigma hemispherical. Seed 1, roundish. A fleshy, 

 parasitic, leafless, purplish-brown plant. Balanophoke^. p. 323. 



752. ZANNICHELIilA. Barren Fl. without Cal. or Cor. Fertile sohtaiy; Cal. of 1 

 L. ; no Cor. Germens from 2 to 6, each with a stalked seed in a sessile capsule. Floating or 

 submersed, with linear, entire L. Potame^. p. 348. 



753. NAIAS. Barren. Anther in a bi-tricuspidate sheath. Fertile. Sheath as in the barren 

 Fl. Style short, subulate. Stigmas 2 or 3. Fr. one-seeded. Aq;uatic platits. L. opposite or 

 in threes. PotamEjE. p. 348. 



II. TRIANDRIA. 



824. SPABGANIUM. Catkins globose. Cal. of 3 or 4 scales. Cor. 0. Fertile Fl. in 

 the lower catkins. Style simple, acute. Drupe diy, operculate, mth 1 or 2 seeds. Smooth 

 aquatic plants, with a solid, leafy, zigzag stem. Typhace.e. p. 379. 



823. TYPHA. Fl. in a dense, soft catkin, in two parts ; the upper barren. Cal. 0. 

 Cor. 0. R«cept. hairy or scaly. Anthers 2-4 on a common filament. Style capillaiy. Seed 



I 2 



