GLOSSARY. 333 



Nut. A hard, one-seeded, indehiscent fruit. HI. 



Ob. When prefixed to words, inverts their meaning ; as 



Obcor'date. The reverse of cordate, the notch being at the apex. 



10. 



Oblong. Longer than wide, with rounded ends. 9. 

 Ob'ovate. The inverse of ovate. 9. 

 Obsolete. Not apparent. Rudimental. 

 O'chreate. With sheathing stipules. 

 Octan'drous. With eight stamens. 49. 

 Oper'culum. The lid of a sporange. 181. 

 Organog'raphy. A description of the organs of plants. 

 Orthot'ropous (ovule). Straight. See Fig. 329. 105. 

 Os'mose. The tendency of fluids to intermix. 

 O'vary. The lowest part of the pistil, containing the seeds. 35. 

 O'vate. Shaped like an egg. 9. 

 O'vule. A rudimentary seed. 103. 

 Pa'lea. Chaff. A bract-like scale among florets. 175. 

 Pal'mate. A form of venation. 4, 13. 

 Pan'icle. A kind of flower-cluster. 31. 

 Pap'pus. A downy calyx. 147. 



Paraph'yses. Filaments along with antherfdia. 180. 

 Pari'etal placentation. Having the placenta attached to the walls 



of the ovary. 99. 



Parted. Deeply divided into parts. 

 Ped'ate. Shaped like a bird's foot. 16. 

 Ped'icel. The flower-stalks in a cluster. 31. 

 Pedun'cle. The flower-stem. 29. 

 Pel'tate. Shield-shaped, n. 

 Pentam'erous. Arranged in fives. 

 Pentan'drous. Having five stamens. 49. 

 Pentas'tichous. In five rows. 129. 

 Perfect flowers. Having stamens and pistil. 

 Per'ianth. Floral leaves. 33. 

 Per'icarp. The wall of the ovary. 107-109. 

 Per'igone. See page 180. 

 Per'istome. A fringe of teeth around the mouth of a sporange. 



181. 



Persist'ent. Remaining long in place. 



Per'sonate. A labiate corolla with a projection in the throat. 45. 

 Peryg'inous. Having the stamens inserted upon the calyx. 62. 

 Pet'al. A leaf of the corolla. 33. 

 Pet'iole. Leaf-stalk, i. 

 Pet'iolule. The stalk of a leaflet. 12. 



