XCVII. PEDALINE® (STAPF), 539 
asymmetric. Ovary superior (very rarely inferior), sessile, 2- (rarely 1-) 
3- or 4-celled ; cells often completely or incompletely divided by spurious 
septa; style filiform, slightly exceeding the anthers; stigma 2-lobed, 
lobes ovate to linear; placentas central ; ovules 1 to many in each cell. 
Fruit very variable, dehiscent or indehiscent, often provided with spines, 
horns or wings. Seeds 1 to many in each cell, sometimes winged, with 
a delicate or stout testa; albumen very thin. Embryo straight; coty- 
ledons flat ; radicle short.—-Annual or perennial herbs, rarely shrubs or 
small trees, more or less covered with sessile mucilage-glands (at least 
the younger parts). Leaves opposite or the upper alternate. Flowers 
mostly axillary and solitary, rarely in few- to many-flowered axillary 
and terminal inflorescences ; pedicels usually with nectarial glands 
(modified flower-buds) at the base. 
Species about 60 in the tropics and the extra-tropical countries of the southern 
hemisphere of the Old World. 
All the African Pedalinee belong to the tribe Pedaliee. 
* Unarmed herbs with solitary or fascicled flowers in 
the leaf-axils. 
+ Ovary and fruit 2-celled, cells undivided. 
Ovules 1-12 in each cell; fruit indehiscent 
(where known). 
Corolia not or only slightly gibbous at the 
base. 
Fruit quadrangular-pyramidal with or 
without a stout spine at the base of 
each angle; annual herbs . : . I. PEDALIUM. 
Fruit winged; perennial herbs with a 
frequently swollen persistent stem- 
2. PTERODISCUS. 
base 5 . = - : 
Corolla with a large sac-like gibbosity at the 
base . x 3. Horvsia. 
Ovules numerous in each cell; fruit tardily 
dehiscent, armed with hook-bearing horns 4. HARPAGOPHYTUM. 
tf Ovary and fruit 2-celled, cells completely or 
incompletely divided by spurions septa. 
False septa of ovary and fruit imperfect towa rds 
the apex; fruit a loculicidal, many-seeded 
capsule. 
Cells of ovary and capsule very unequal, the 
posticous smal] and indeliscent 
Cells of ovary and capsule equal. 
Capsule acute or beaked, without lateral 
appendages . ° . 
Capsule with 2 divergent horns or spines 
at the apex : . : ; : 
Ovary and fruit completely divided by false 
septa. 
Fruit without central spines; ovules 3 in 
each division : : : : ; 
Fruit disc-shaped, with 2 central spines ; 
ovules 2 in each division : : - - 
+++ Ovary and fruit 1-celled with a rudimentary 
septum . . . : . 
. ROGERIA, 
oO 
6. SESAMUM. 
boa | 
. CERATOTHECA. 
8. PRETREOTHAMNUS. 
PRETREA. 
10, LINARIOPSIS. 
