1915] 



BESSEY — PHYLOGENETIC TAXONOMY 145 



ovules 1 or more in each cell; endosperm fleshy. Cobaea, 

 Phlox, Gilia, Polemonium. (Pf. 4 3a :40.) 



Family 173. Convolvulaceae. Morning-glories. Herbs 

 (often climbing), shrubs (and trees) with alternate leaves and 

 pentamerous flowers; corolla-limb more or less plicate (rarely 

 imbricated); ovary 2 (3-5) -celled; ovules few; endosperm 

 fleshy. Evolvulus, Quamoclit, Ipomoea, Convolvulus, Cus- 

 cuta (parasitic). (Pf. 4 3a :l.) 



Family 174. Hydrophyllaceae. Herbs with radical or alter- 

 nate (rarely opposite) leaves and pentamerous flowers; 

 corolla-lobes imbricated (or contorted) ; ovary 1 or incom- 

 pletely 2-celled ; ovules 2 or more ; endosperm fleshy. Hydro- 

 phyllum, Phacelia, Nama. (Pf. 4 3a :54.) 



Family 175. Borraginaceae. Forget-me-nots. Herbs, shrubs, 

 and trees with alternate leaves and pentamerous flowers; 

 corolla-lobes imbricated (or contorted) ; ovary bicarpellary, 

 4-celled, 4-lobed; ovules solitary in each lobe; endosperm 

 fleshy or 0. Heliotropium, Cynoglossum, Oreocarya, Borrago, 

 Myosotis, Mertensia, Lithospermum. (Pf. 4 s *: 71.) 



Family 176. Nolanaceae. Herbaceous or suffrute scent pros- 

 trate South American plants, with alternate, entire leaves; 

 calyx 5-parted ; corolla long funnel-shaped ; stamens 5, inserted 

 on the corolla ; carpels 5, distinct or united ; endosperm fleshy. 

 Nolana. (Pf. 4 3b :l.) 



Family 177. Solanaceae. Nightshades. Herbs, shrubs (and 

 trees) with alternate leaves and pentamerous, mostly regular, 

 but sometimes irregular flowers; corolla-limb more or less 

 plicate (rarely imbricated); ovary mostly 2-celled; ovules 

 many; endosperm fleshy. Lycium, Atropa, Hyoscyamus, 

 Physalis, Capsicum, Solanum, Datura, Nicotiana, Petunia. 

 (Pf. 4 3b :4.) 



Order Scrophulariales. Corolla mostly zygomorphic (ir- 

 regular or oblique) ; stamens fewer than the corolla-lobes, 

 usually 4 or 2; ovules numerous; fruit mostly capsular (i. e., 

 dehiscent). (Species about 7081.) 



Family 178. Scrophulariaceae. Snapdragons. Herbs (or 

 shrubs and small trees) with alternate, opposite, or whorled 



