SYNOPTICAL KEY. 5 



34 Droseracese. Sepals and petals 5 : styles 3, 2-parted : capsule 3-valved, 



many-seeded. Low marsh herbs with the leaves all radical and beset 

 with gland-tipped hairs. 



35 Ceratophyllaceae. Fruit a crustaceous 1-seeded achene. Submersed 



aquatic herbs with finely dissected whorled leaves and minute axillary 

 flowers. 



36 Lythraceae. Flowers 4- or 6-merous : style 1 : capsule enclosed in the 



calyx, 2-4-celled, many-seeded. Herbs with mostly opposite leaves 

 and axillary flowers. 



* * Ovary wholly inferior. 



■*- Fruit with central placenta?: stamens few. 



+* Not tendril-bearing and flowers not in umbels: stipules none. 



37 Halorageae. Fruit indehiscent, nut-like, 1-4-celled, with a single sus- 



pended seed in each cell. Aquatic herbs with opposite or verticillate 

 leaves and inconspicuous axillary flowers. 



38 Onagraceae. Flowers 2- or 4-merous : calyx valvate in the bud ; style 



1 ; fruit a 2- or 4-celled capsule or berry-like. 



++ ++ Tendril-bearing herbs with alternate leaves without stipules. 



39 Cucurbitaceae. Flowers monoecious or dioecious, often gamopetalous : 



fruit fleshy, indehiscent, 1-several-celled. 



•*- ■*- Fruit with parietal placentae, several-many-seeded : stamens 

 many: stipules none . 



40 Loasaceae. Flowers perfect, conspicuous; style 3-cleft : capsule 1-cell- 

 ed; leaves rough with tenacious hairs. 



41 Ficoideae Sepals mostly 5; petals none; capsule 3-5-celled. 



42 Cactaceae. Sepals and petals numerous: stamens many: capsule 



1-celled. Leafless, usually prickly, fleshy perennials. 



+- h- +- Fruit indehiscent; dry, berry-like ,or drupe-like, mostly 

 2-celled, with a suspended seed in each cell: ovary with an epigynous 

 disk (wanting in Garrya). 



** Flowers in umbels. 



43 Umbelliferae. Carpels and styles 2: fruit dry. 



44 Araliaceae. Carpels and styles 4 or 5, becoming a berry-like fruit. 



-M- -M- Flowers in cymes or aments. 



45 Cornaceae. Inflorescence cymose : flowers perfect, 4-merous : style 1 : 



fruit baccate, 2-3-celled. Herbs shrubs or trees with opposite leaves. 



46 Garryaceae. Flowers in aments, dioecious : sepals 4 : petals none : styles 



2: fruit baccate, 1-celled. Shrubs with opposite, simple leaves. 

 Flowers perfect, cymose, 5-merous; petals imbricated, united: fruit baccate 

 berries containing 1-5 seed-like nutlets. Sambucex. 



