238 PB ACTIO AL GUIDE TO GABDEN PLANTS poltgala 



tipped with purple, fragrant, in axillary August of a fine rosy -purple colour, some- 

 few-flowered racemes. The variety jiwr- times white, large, in threes ; keel crested. 

 purea is a much prettier plant, with Culture Sc. as above, 

 bright magenta-purple flowers, clear p_ gg„ (Seneca Snake Boot).— 

 yeUow m the centre. jijgo ^g^jj^g ^f jj America, 6-12 in. high. 

 Culture Sc. as above. ^itjj lanee-shaped or oblong, rough-mar- 

 P. paucifolia. — A North American gined leaves. Flowers in May and June, 

 herbaceous perennial 3 in. high, with almost sessile ; wings roundish obovate, 

 simple erect stems, naked below, and concave ; crest short, 

 ovate leaves. Flowers from May to Culture dc. as above. 



XVIII. FRANKENIACE^— Sea Heath Order 



An order with only one genus (Prankenia) consisting of perennial herbs or 

 much-branched undershrubs with jointed nodes. The leaves are opposite, 

 small, without stipules, and the usually pink flowers are regular and herm- 

 aphrodite, being sessile in the division of the branches, and terminal, embosomed 

 in the leaves. Sepals 4-6, united in a furrowed tube. Petals alternate with 

 the sepals, hypogynous, clawed, often with appendages at the base of the 

 limb. Stamens, 6, sometimes 4, 5, or numerous, hypogynous, free, or slightly 

 connate at the base. Ovary 1-celled, many-seeded. Fruit 2-, 3-, or 4-valved, 

 enclosed by the calyx. 



This order contains about 30 species chiefly natives of Northern Africa 

 and Southern Europe, although a few are indigenous to South Africa, New 

 Holland, and temperate Asia. 



FRANKENIA laevis (Sea Heath). — This is a small creeping evergreen with pubes- 

 cent stems and wiry branches having oblong linear leaves with reflexed margins, and 

 small rose-coloured flowers which appear in July and August. It is found wild on 

 our southern sea coasts and the Channel Islands, and may be used in the rock garden. 



Culture cmd Propagation. — This species will thrive in ordinary garden soU, and 

 may be used in sunny and rather dry positions. It is most readily increased by 

 dividing the rootstooks in early autumn or in spring. Seeds may also be sown in cold 

 frames as soon as ripe, or in the open border in April and May, but they are more 

 easily attended to if sown in boxes or pans in a cold frame or greenhouse. 



XIX. CARYOPHYLLE.^— Carnation, Clove, and Pink Order 



A large order containing from 800 to 1,200 species, natives chiefly of the cold 

 and temperate parts of the world. Annual or perennial herbs, rarely shrubby, 

 branches usually thickened, and sometimes jointed, at the nodes. Leaves 

 always opposite and entire, often connate at the base, often 1-3-nerved ; 

 stipules none, or if any small and scarious. Flowers hermaphrodite, rarely 

 unisexual by abortion. Sepals 4-5, persistent, distinct or cohering in a tube. 

 Petals 4-5, hypogynous or slightly perigynous, entire, or frequently split into 

 2 parts, sometimes minute, scale-like, or absent. Stamens (8-10) usually twice 

 as many as the petals, in two circles, of which the inner is often wanting ; 

 filaments awl-shaped. Fruit a 2-5-\'alved capsule with numerous seeds. 

 Placenta free, central. 



DIANTHUS. — This is the genus to as many as 200 species were described 

 which Carnations, Pinlcs, and Sweet under it, but this number has been reduced 

 Williams belong botanicaUy. At one time to about 70 by Bentham and Hooker. 



