112 PENTANDBJA. [cL. T. 



43. CHENOPO'DIUM. Seed lenticular, superior to the five- 

 cleft, persistent calyx. 



45. SAI/SOLA. Capsule closed, imbedded in the fleshy calyx. 

 Seed with a spiral embryo. 



42. HERNIA'RIA. Capsule closed, membranous, invested by the 

 calyx. Stamens with five imperfect filaments. 



46. UL'MTJS. Capsule closed, membranous, compressed, mar- 



gined, superior. 



(Polygonum amphibium.) 



*** Flowers of five petals, superior, two-seeded. 



A. Umbels and Umbellules furnished with involucres consisting of 



bracteas. 



49. ERYN'GIUM. Fruit egg-shaped, covered with straight 



bristles. Petals oblong, equal, inflected, undivided. Flowers 

 aggregate, forming a head. 



50. HYDROCO'TYLE. Fruit round, compressed laterally, striated. 



Petals egg-shaped, acute, equal. Flowers in a simple umbel. 



51. SANFCULA. Fruit egg-shaped, covered with hooked bris- 



tles. Petals lance-shaped, inflected, nearly equal. Umbel- 

 lules clustered, the central flowers destitute of stamens and 

 pistils. 



82. HERA'CLEUM. Fruit elliptical, compressed, striated. Petals 

 inversely heart- shaped, radiant. Styles pyramidal at the base. 



65. CENA'NTHE. Fruit oblong, somewhat spongy, ribbed. Pe- 



tals inversely heart-shaped, radiant, very unequal. Styles 

 slender, enlarged at the base. 



52. CAU'CALIS. Fruit oblong, compressed transversely. Seeds 



with four rows of ascending, awl-shaped, hooked prickles. 

 Petals inversely heart-shaped, unequal. 



58. DAU'CTJS. Fruit oblong, compressed transversely. Seeds 



with four rows of flat prickles and rough intermediate ribs. 



Petals inversely heart-shaped, unequal. 

 80. PEUCE'DANUM. Fruit nearly orbicular, crowned with the 



calyx and styles. Petals inversely heart-shaped, all nearly 



equal. Styles very short, greatly dilated at the base. 

 64. CONI'UM. Fruit egg-shaped, with ten acute ribs. Petals 



inversely heart-shaped, slightly unequal. Styles a little 



tumid at the base. 



59. BU'NIUM. Fruit egg-shaped, strong ribbed. Petals inversely 



heart-shaped, equal. Styles awl- shaped, much swelled at 

 the base. 



60. SI'UM. Fruit egg-shaped or orbicular, ribbed. Petals in- 



versely heart-shaped, or egg-shaped, equal. Styles cylin- 

 drical, swelling a little at the base. 



61. SI'SON. Fruit egg-shaped or nearly orbicular, ribbed. Petals 



elliptical or inversely heart-shaped, involute at the point, 

 equal. Styles very short and thick. 



79. SELI'NUM. Fruit elliptical, ribbed, crowned with the calyx 

 and style. Petals inversely heart-shaped, involute, equal. 

 Styles with a tumid hemispherical base. 



66. CRITH'MUM. Fruit elliptical, ribbed, crowned. Petals 



elliptical, acute, incurved, equal. Styles short and thick, 

 with swelled base. 



72. LIGUS'TICUM. Fruit oblong, winged. Petals elliptical, 

 flattish, contracted at both ends, equal. Styles thick, tumid 

 at the base. 



