GROUPS AND ORDERS. 139 



one ovule, which is pendulous from the point of a thread 

 (umbilical cord) rising from the base of the cavity. 



$$ Stamens alternating with the corolla-lobes. 



40. Plantaginaceous plants herbs ; stamens equalling in num- 



ber the lobes of the four- cleft regular corolla ; style one ; 

 ovary 1-2-celled, with one or several ovules. 



41. Lentibulariaceous plants herbs ; corolla irregular, two 



lipped ; stamens two, fewer than the corolla-lobes ; ovary 

 1-celled, many-seeded. 



ft Seeds attacked to the sides of the cells (placentas parietal), 

 or in their axial angle. 



J Corolla regular or nearly so. 

 Ovary entire (not lobed), its cells with one or two ovules. 



42. Aquifoliaceous plants trees or shrubs ; corolla 4-6-parted ; 



stamens as many, alternating with its lobes; fruit fleshy, 

 4-celled, with one ovule in each cell. 



43. Oleaceous plants trees or shrubs ; corolla 4-parted or want- 



ing, with two stamens alternating with its lobes ; ovary two- 

 celled, the cells two-seeded. 



44. Convolvulaceous plants herbs ; corolla plaited, 4-5-lobed, 



with as many alternating stamens ; ovary 2-3-celled, the 

 cells two- (rarely one-) seeded. 



Ovary entire (not lobed), its cells containing many seeds. 



45. Polemoniaceous plants herbs ; corolla five-lobed, with as 



many alternating stamens ; ovary three-celled. 



46. Gentianaceous plants herbs ; corolla usually five-lobed 



(sometimes 4, 6, 8 or 10) with as many alternating stamens, 

 twisted ; ovary 1-2-celled. 



47. Solanaceous plants herbs ; corolla five, rarely four-lobed, 



with as many alternating stamens, plaited ; ovary two-celled. 



Ovary four-lobed. 



48. Boraginaceous plants herbs ; corolla five, rarely four-lobed, 



