SYNOPTICAL KEY. — 5 
34 Droseracex. 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 Ceratophyllaceew. Fruit a crustaceous 1-seeded achene. Submersed 
ve nae herbs with finely dissected whorled leaves and minute axillary 
owers. 
36 Lythracex. 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 placent: stamens few. 
++ Not tendril-bearing and flowers not in umbels: stipules none. 
37 Halorageex. 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 Onagracee. 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. 
89 Cucurbitacer. Flowers monccious or dicecious, often gamopetalous: 
fruit fleshy, indehiscent, 1-several-celled. 
+ + Fruit with parietal placents, several-many-seeded: stamens 
many: stipules none. 
40 Loasacee. Flowers perfect, conspicuous; style 3-cleft: capsule 1-cell- 
ed; leaves rough with tenacious hairs. 
41 Ficoidez Sepals mostly 5; petals none; capsule 3-5-celled. 
42 Cactacee. Sepals and petals numerous: stamens many: capsule 
1-celled. Leafless, usually prickly, fleshy perennials. 
+ + + 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 Umbelliferz. Carpels and styles 2: fruit dry. 
44 Araliacew. Carpels and styles 4 or 5, becoming a berry-like fruit. 
++ ++ Flowers in cymes or aments. 
45 Cornacex. Inflorescence cymose: flowers perfect, 4-merous: style 1: 
fruit baccate, 2-3-celled. Herbs shrubs or trees with opposite leaves. 
46 Garryacex. Flowersin aments, dicecious: 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. 
