GERANIACEAE— OXALIDACEAE— KUTACEAE 



17 



6.W VlU 



Plate ": A, Geranium maculatum, 1, lluucr, 2, fruit; B, Oxalis stricta, 1, flower, 2, fruit; 



i '. R eolens, 1. flower, 2, fruit; I). Plelea trifoliata, 1. flown-. 2. fruit; E, Euphor- 



bia corollata; F, Euphorbia glyptosperma, 1. flower; 2, fruit; (',. Celtis occidentalis, 1. 



staminate flower, 2, pistillate flower. 3, fruit; II. llmus americana, 1, cluster, 2, flower, 



fruit 



(A maculatum 

 G. bickncllii 



E. cicutarutm 



O. sfricta 



O. violdcea 

 O. acctosella 



Geranium -Geranium, Cranesbill 



g-eranion, cranes bill, geranium) 

 PI. 6, fig. A: 1. 2 



1. Flowers 2-3 cm. broad 



2. Flowers 5-12 mm. broad 



Erodium — Storksbill 



(Gr. erodios, heron) 

 - pinnate, deeply cut; flowers pinkish 



Oxalidaceae — Oxalis Family 

 Herbs with trifoliate leaves; sepals 5, petals 5, stamens 10-15, ovary 5-celled ; flower syncar- 

 pous, apopetalous, hypogynous, regular. 



6xalis — Oxalis, Wood-sorrel 



(Gr. oxalis, sorrel; 

 PI. 6, fig. B: 1, 2 



1. Flowers yellow, on leafy stems 



2. Flowers white, pink or purple, on leafless stems 



a. Flowers rose-purple, 3-12 together 



b. Flowers pink, rarely white, single 



Rutaceae — Rue Family 

 Trees or shrubs, usually with compound leaves; sepals 4-5 or none, petals 4-5, stamens 4-10, 

 pistils distinct, 2-5, or compound; flower apocarpous or syncarpous, apopetalous, hypogynous, reg- 

 ular. 



1. Herbs 



a. Flowers greenish yellow; petals usually 4 



b. Flowers red-purple to white ; petals 5 



2. Small trees 



a. Leaflets 3 ; branches smooth 



b. Leaflets 9-11; branches prickly 



Ruta — Rue 



(Latin name of the rue) 

 PI. 6. fig. C: 1. 2 

 Bushy herb, 2-4 ft. high ; flowers in corymbs 



Dictamnus — Dittany, Fraxinella 



(The Greek name) 

 Aromatic sticky herb, 2-3 ft. high; flowers in a raceme 



Ptelea — Hop-tree 



(Greek name of the elm) 

 PI. 6, fig. D: 1, 2 

 Small tree, 15-30 ft. high; fruits winged P. trifoliata 



Ruta 

 Dictamnus 



Ptelea 



Xanthoxylum 



R. graveolens 



D. fraxinella 



