498 210. PEDALIACEAE 



FAMILY 210. PEDALIACEAE 



Plants with glandular hairs. Leaves opposite, at least the lower ones, 

 simple. Flowers irregular, hermaphrodite. Calj'x 5-partite. Petals 5, united 

 below, imbricate in bud. Stamens inserted on the lower part of the corolla-tube, 

 the 4 fertile in pairs of unequal length, the fifth sterile, small, awl-shaped. 

 Ovary superior, 2 — 8-celled with 2 or more axile ovules in each cell, rarely 

 {Linariopsis) i-celled with 2 basal ovules. Style i, long, with 2 stigmas or 

 stigmatic lobes. Fruit a capsule or a nut. Seeds with a straight embryo and 

 thin albumen. — Genera 14, species 65. (Plate 138.) 



1. Flowers in terminal, raceme- or umbel-like cymes. Shrubs or small trees- 



Ovary 2 — 4-celled with numerous ovules in each cell. Fruit a capsule. 2 



Flowers solitary or in fascicles in the axils of the leaves, with glands at the 



base of the pedicels. Herbs, rarely {Pretreothamnus) shrubs, but then 



ovules 3 in each ovary-cell 4 



2. Inflorescences umbel- or fascicle-like. Glands at the base of the pedicels 



none. Corolla-tube moderately long, funnel-shaped, neither spurred nor 

 curved. Anthers included ; halves divergent, pendulous. Disc slightly 

 one-sided. Ovary-cells not or very incompletely chambered. Fruit 

 beset with hooked bristles. Seeds narrowly winged. Leaves large, 

 broad, long-stalked, lobed. Spines none. — Species 6. Madagascar. 



(Under Harpagophytum DC.) Uncarina (Baill.) Stapf 



Inflorescences raceme-like. Glands at the base of the pedicels presente 

 Corolla-tube very long, cylindrical, spurred or curved. Ovary-cell, 

 nearly completely chambered. Leaves small, partly replaced by 

 spines, 3 



3. Corolla spurred. Anthers scarcely exserted, with parallel halves. Disc 



one-sided. Stem much thickened at the base. — Species 6. Central 



Africa Sesamothamnus Welw. 



Corolla not spurred, with an S-shaped tube, yellow. Anthers exserted, 

 with divergent halves. Disc equal-sided. Stem not much thickened. 

 Species i. Southern West Africa (Damaraland). Sigmatosiphon Engl. 



4. Ovary and fruit i-celled. Ovules 2, erect. Seed i. Calyx-lobes very 



unequal. Corolla violet ; tube widened from the base, almost straight. 

 Anther-halves parallel. Disc equal-sided. Stem prostrate, hairy. 

 Leaves undivided. Flowers solitary. — Species i. Southern West 



Africa (Angola). Used medicinally Linariopsis Welw. 



Ovary and fruit 2— 4-celled. Ovules 2 or more in each cell 5 



5. Ovary and fruit 2-celled, with undivided cells. Ovules descending or 



horizontal. Leaves toothed, lobed, or divided. Flowers solitary. . 6 



Ovary and fruit 2 — 4-celled, each cell completely or incompletely divided 



into two chambers 10 



