366 THE PLANT PHYLA 
tropical trees.—162, Sapotaceae; 163, 
Ebenaceae; 164, Symplocaceae; 165, 
Styracaceae. 
Super-Order AXIFLORAE-GAMOPETALAE-DICARPELLATAE. 
Carpels typically two, united; petals 
united. 
Order PoLEMONIALES. Corolla regular; stamens as many 
as the corolla lobes; leaves mostly 
alternate. 
Family 166. Polemoniaceae. Phloxes. Mostly herbs 
with alternate or opposite leaves; 
pistil tricarpellary.—Phlox Gilia, Pol- 
emonium. 
Family 167. Convolvulaceae. Morning Glories. Most- 
ly herbs and shrubs with alternate 
leaves; pistil mostly bicarpellary. 
—Convolvulus, Ipomoea, Evolvulus, 
Cuscuta. | 
Family 168. Hydrophyllaceae. Soft herbs; pistil bi- 
carpellary.—Hydrophyllum, Pha- 
: celia. 
Family 169. Borraginaceae. Forget-me-nots. Herbs, 
shrubs and trees; pistil bicarpellary, 
4-celled.—Heliotropium, Borrago, 
Myosotis, Mertensia, Lithospermum. 
Family 170. Nolanaceae. 
Family 171. Solanaceae. Nightshades. Mostly herbs 
and shrubs; pistil bicarpellary, mostly 
2-celled.—Solanum, Atropa, Physalis, 
Capsicum, Datura, Nicotiana, Pe- 
tunia. 
Order GENTIANALES. Corolla regular; stamens as many as 
the corolla lobes; leaves opposite. 
Family 172, Oleaceae. Olives. Mostly shrubs and 
trees; stamens 2 or 4; ovary 2-celled. 
—Olea, Syringa, Jasminum, Fraxinus. 
Family 173. Salvadoraceae; 174, Loganiaceae. 
Family 175. Gentianaceae. Mostly herbs with limpid 
juice; ovary usually 1-celled.—Gen- 
tiana, Eustoma, Menyanthes. 
Family 176. Apocynaceae. ‘Trees, shrubs and herbs 
