TTARELLA CORDIFOLIA. 



Then, of low-growing creepers in the kindred of Th. Serpyllum are 

 Th. odoratissimus, comptus, cappadocicus, villosus, latinus (quite flat), 

 nitidus, marginatus, pannonicus, and azoricus (some of these coming 

 suspiciously close under the shadow of Th. Serpyllum). Th. striatus 

 (Th. Zygis) is a trifle staffer and leafier and larger, with larger flowers, 

 leading on to the next group of more upstanding small neat bush- 

 thymes, of which Th. Chamaedrys and Th. citriodorus are the best 

 known types, this last having a silver and a golden variety often used 

 for edgings, and borrowing for its enhancement the scent of Aloysia. 

 Another plant of special sweetness where all are sweet is Th. Piperella, 

 with fat and stiff little twigs ; and yet another, Th. Herba-barona, 

 whose especial fragrance is of seed-cake, most delightful to those who 

 rightly appreciate that dear confection. Th. teucrioeides from Par- 

 nassus is a weakly bushling suggestive of Calamintha alpina, specially 

 branchy, and rising up all over at the ends to show off its tiny pink 

 flowers. Th. hirsutus is pink too, and makes the most lovely tight 

 small tufts after the habit of Galium olympicum ; while yet another 

 tidy close clump is built by Th. micans, starry and wiry in effect ; and 

 less so is Th. FuncJcii from Murcia, which makes a stiff concise grey 

 mound. Th. Billardieri goes back towards Th. Serpyllum, and flops 

 and creeps and roots freely as it goes forward like the serpent on its 

 belly, covering the ground in a carpet of very narrow tiny leaves, 

 fringed with white hair, that enhance the twinkle of the rosy blooms. 

 And Th. Cephalotes is the most brilliant of all the bushlings — a most 

 dense and branching downy mass of 4 or 6 inches, with the leafy grey 

 cushion all odorous of camphor, while the flower-bracts are dense too, 

 and brilliant purple, enclosing blossoms of contrasting brilliant pink. 



Tiarella cordifolia. — The Foam-flower is the delight of shady 

 banks on the cool rock- work or wood garden, where it makes tufts of 

 its handsome delicately-green five-lobed leaves, and sends out runners 

 far and wide with more ; while from the mass in June there rises a 

 profusion of diaphanous pinky bare stems of 6 or 8 inches, ending in a 

 little fluffy spire of white blossom like a Spiraea's, warmed by the 

 Cochin-China-hen's-egg colour of the anthers. It is perfectly easy to 

 grow in such conditions, and rooted runners can be taken off at any 

 timo. There is, however, a giant form, T. unifoliata, also an American, 

 that grows three times the size, but sits quite close in a widening clump, 

 as it were a Heuchera, with upstanding spires of yet creamier-warm 

 foam all through the full summer, on stems of 18 inches or more. 

 This does not require coolness and shade, but appreciates the richest 

 soil it can get, in open bed or border. T. purpurea is a dark-leaved 

 form of T. cordifolia with pinkish flowers, and T. polyphylla is a 



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