502 215- GLOBÜLARIACEAE — 2l6. ACANTHACEAE 



FAMILY 215. GOBÜLARIACEAE 



Shrubs. Leaves alternate, undivided, without stipules. Flowers in heads 

 or spikes, irregular, hermaphrodite. Calyx 5-cleft. Corolla 2-lipped, 5- 

 lobed, usually blue. Stamens 4, in two pairs of unequal length, attached to 

 the corolla. Staminodes none. Anthers turned inwards, 2-celled, opening 

 by a transverse sht. Disc present, usually gland-like. Ovary superior, i- 

 celled. Ovule i, pendulous, inverted. Style simple ; stigma entire or 2-lobed. 

 Fruit dry, indehiscent. Seed albuminous ; embryo straight, the radicle 

 turned upwards. — Genera 3, species 6. North Africa, Cape Verde Islands, 

 and Socotra. (Under SELAGINEAE.) 



1. Flowers in spikes. Corolla scarcely exceeding the calyx ; lobes of the 



upper lip similar to those of the lower. — Species i. Island of Socotra. 



Cockburnia Balf. 



Flowers in heads. Corolla distinctly exceeding the calyx ; lobes of the 



upper lip much shorter than those of the lower 2 



2. Heads axillary. Corolla-tube slit open between the lobes of the upper hp. 



— Species 2. Madeira, Canaries, and Cape Verde Islands. (Under 



Glohularia L.) Lytanthus Wettst. 



Heads terminal. Corolla-tube not slit. — Species 3. North Africa. 

 Used medicinally Globularia L. 



SUBORDER ACANTHINEAE 

 FAMILY 216. ACANTHACEAE 



Leaves opposite or whorled, simple, without stipules, usually dotted with 

 cystoliths. Flowers more or less irregular, 4 — 5-merous, hermaphrodite. 

 Petals united below. Fertile stamens 2 or 4. Disc usually present. Style 

 simple. Stigma entire or 2-lobed, rarely 4-lobed. Ovary superior, 2-celled, 

 rarely {Afromendoncia) i -celled. Fruit a loculicidal capsule, the valves bearing 

 the split dissepiments, more rarely a drupe. Seeds 2 or more, mostly exalbum- 

 inous ; funicle usually with a hook-hke outgrowth. — Genera 106, species 

 1100. (Plate 142.) 



1. Fruit a i — 2-celled, i — 2-seeded drupe. Funicles small, without an out- 



growth. Ovary i — 2-celled, with 2 ovules in each cell. Stamens 4, 

 with 2-celled anthers. Corolla with contorted aestivation. Calyx 

 minute, enveloped by two large bracteoles. Flowers solitary or in 

 clusters in the leaf-axils, rarely in terminal racemes. Leaves not dotted 

 with cystoliths. Climbing shrubs. [Subfamily MENDONCIOID- 



EAE.] 2 



Fruit a 2-celled, 2- or more-seeded capsule. Funicles with a tubercle- 

 or hook-shaped outgrowth, or thickened throughout their length. 

 Ovary 2-celled 4 



2. Ovary i-celled. Fruit oblong or ovate. Flowers in axillary clusters. — 



Species 6. Tropics. (Including Liraya Pierre, under Mendoncia 



Veil.) Afromendoncia Gilg 



Ovary 2-celled, at least when young 3 



