CLASS VII. AND VIII. XXX7 



PAOB. 



* * * Flowers with neitlier calyx, nor corolla. Leaves 

 nct-vciutJ. 



Svinumrs. — Flowi*r* white, in a solitary spike. Scales 1-flowcrcd. — Aquatic. 



Lvuvesharrt-shaped. 313 



Order XIII. Polygyria. — Many pistils. 



Ajjska.— S>>p.ds 3. green. Petals 3.— -Aquatic herbs, wifh radical ribbed leaves, 



and small white or reddish Jlowers in a branched panicle. 35* 



CLASS VII. HEPTANDRIA.-7 Stamens. 



Tiuent \us. —Calyx deeply 6 to 8 parted. Corolla deeply 6 to 8-parte«l : spread- 

 ing.— Leaves whirled at the swwnit. Flowers few, white, on solitary 

 p, dunce-. 227 



.— Calyx boll-shaped, 5 toothed. Patals 4 rarely 5, more or less un9- 

 qu.il, wall cla./s. — I'r^s or shrubs, with 5 to 7 faliati leaves. 71 



Order II— IV. Di-Tetragyxia. — S'yles or stiymas 2 to 4. 



Polygonum.— Sepals colored, most'y 5. Ovary 1-celled. — Stems jointed. 3j3 



Ul."U-. — Filaments long and Blender. Styles 2. short. Fruit a 1-celled 1-seeded 



samara, v.m.- d all around. — Trees. 311 



BiVRiiUi.— Ovark-s 3 or 4. Calyx and corolla none— Aquatic herbs. 313 



CLASS VIII. OCTANDPvIA.— 8 Stamens. 



Order I. Moxogynta. 

 * Curolla polypi talom, free. 



J,iF3.o:;;.\. — Sepals 4. PjtLtIs 8. Stigma peltate. — Scape simple. \flowered. 17 



Hypopefy: — Segals -1 or 5 colored. Petals 4 or 5, fieshv.— Parasitic tawny white 



221 



** Corolla of A petals. 



f ratals on the summit of the adherent calyx- tube.. 



FvI:exia. — Oalyx-tttbe urn-sit ape], narrowed at the apex, with a 4-cleft limb. 

 AVfal- obovate. Authors l.-u B ' ; curved.— Leaves 3 to o-nerved. Floww* 

 ry.nose, purplish. Ill 



«.— Calyx-tuba 4 sM d, th^ limb 4-parted. Anthers short, fixed by 

 the middle* Stigma often with 4 spreading lobes. Seeus crowned with 

 a tufc of hairs. — Herts, %viih nearly sessile leaves. 113 



(Enoth.ra. — Calyx-lobes 1. refl :•:, 1. Anthers mostly linear. Stigma 4-lobed 



or capitate. — Htrbs, with mostly yellow Jlowers. 114 



Gacra. — Calyx-tube much prolonged beyond the ovary, with a 4-cleft reflexed 



limb. Petals somewhat unequal. — Flowers rose-color or white. 115 



ft Petals unequal. 



■CARDio.spr.r.M'jM. — Sepals 4. the 2 outor smallest. Petals 4, each with an emar- 

 ginate scale at. the has?. Stamens unequal. Style trifid. — Climbing 

 herbs, with biternate leaves. 70 



* * * Corolla monopetaloas. 



f Flowars with a corolli-li^e perianth . 



j TIIVMELACE.F. — Shrubs, with acrid and very tough bark, entire leaves, 



And pcrllxt flowers. 3£8 



