TIARELLA 



TIBOUCHINA 



3343 



3806. Tiarella cordifolia. ( X X) 



TIARELLA (Latin, a little tiara or turban; in refer- 

 ence to the form of the pistil). Saxifragdcefe. FALSE 

 MITREWORT. Slender erect hardy perennial herbs, 

 useful for the wild-garden or anv shaded spot. 



Leaves sev- 

 eral, radical, 

 long-petioled, 

 simple or 3-foli- 

 ate; stipules 

 small, adnate to 

 the petiole: ra- 

 ceme terminal, 

 somewhat brac- 

 teate, simple or 

 compound : fls. 

 white or reddish; 

 calyx-tube short, 

 lobes 5, ovate; 

 petals 5, entire; 

 stamens 10; 

 ovary superior, 

 compressed, 1- 

 celled: caps, 

 membranaceous, 

 1-celled, 2- 

 valved. About 

 8 species, 1 from 

 Japan, 1 from 

 the Himalayas, 

 the remainder 

 from N. Amer. 

 These plants are 

 little grown, but 

 they are useful for colonizing or perhaps for the rock- 

 garden and are particularly attractive in the autumn 

 on account of their brilliant If.-coloring. Prop, by 

 division. 



A. Lvs. simple. 

 B. Petals oblong. 



cordifdlia, Linn. FOAM-FLOWER. Fig. 3806. A hand- 

 some native perennial, forming a tufted mass, 6-12 in. 

 high, of broadly ovate lobed and serrate Ivs. and simple 

 erect racemes of white fls. borne well above the foliage 

 in May. Fls. about J^in. across; petals oblong, clawed, 

 somewhat exceeding the white calyx-lobes. In rich, 

 moist woodland, Nova Scotia to Ont., south to Ga. 

 Gn. 22, p. 21; 32, p. 511; 53, p. 456; 55, p. 40; 66, p. 87. 

 V. 11:35. G.L. 26:153. C.L.A. 4:340. G. 6:27; 10: 

 144; 12:127; 17:464. Gn.M. 1:188. Gn.W. 21:893. 

 J.H. III. 54:423. An elegant plant well worthy of 

 general cult. It is a lover of cool shaded places and of 

 rich moist soil. It will do well, however, in ordinary 

 soil and flower freely in a half -shaded place, but the 

 varied If. -markings of bronzy red and other signs of 

 luxuriance are not brought out to their fullest extent 

 except with moisture, coolness and a fairly rich soil. 

 The plant forces well and easily in a coolhouse for early 

 spring flowering. It is tenacious of life and generally 

 easy to manage. Var. albiflora, Hort., is a fine white- 

 fld.'form. Var. purpurea, Hort. (T. purpurea, Hort.), is 

 a purple-fld. form, of which the following variations 

 are also offered in the trade: purpurea m&jor, with sal- 

 mon-rose or wine-red fls. ; purpurea major compdcta, a 

 more compact grower with bronzy chamois-colored fls.; 

 purpurea marmorata, with very attractive bronze foliage 

 passing to blackish green and marbled with purple: fls. 

 very numerous, maroon. 



BB. Petals filiform, inconspicuous. 

 unifoliata, Hook. Hardy perennial: Ivs. thin, 

 rounded or triangular, 3-5-lobed, the lobes crenate- 

 toothed; st.-lvs. usually only 1, rarely 2-3: panicle 

 loose; petals small. W. Amer. The lobing of the Ivs., 

 according to Bot. of Calif., varies so that it may pass 

 into the next species. 



AA. Lvs. 3-foliolate. 



trifoliate, Linn. Resembling T. unifoliata except in 

 having 3-foliolate Ivs. Ore. to Alaska, also N. W. Asia. 



T. toernAta, Vent.=Astilbe biternata. 



F. W. BARCLAY. 



F. TRACY HUBBARD.! 



TIBOUCHINA (native name in Guiana). Including 

 Plerbma. Melastomaceae. Shrubs or subshrubs, rarely 

 herbs, sometimes climbing, usually strigose-pilose or 

 hispid, adapted to the warmhouse or to out-of-doors in 

 the extreme South. 



Leaves usually large, leathery, petioled, ovate or 

 oblong, entire, 3-7-nerved: fls. generally in trichotomous 

 terminal panicles, large, violet or purple, rarely 4- 

 merous; calyx hirsute or strigose, tube ovoid, campanu- 

 late, urn-shaped or elongated, lobes 5, subulate, lanceo- 

 late or oblong; petals 5, obovate; stamens 10; ovary 

 free or adhering toward the base to the 5 calyx-ribs, 

 5-celled: caps. 5-valved. About 215 species, Trop. 

 Amer., but chiefly from Brazil. 



Tibouchinas are among the handsomest of our inter- 

 mediate greenhouse plants, and can be readily trained 

 in bush form, probably with the exception of T. semi- 

 decandra, which is better adapted as a pillar or trellis 

 plant. These plants may be propagated at any time of 

 the year, but early spring is the best season. Small pots 

 should be half filled with sandy loam, the remainder 

 being all sand and the cuttings inserted singly. They 

 should be kept quite close and fairly moist, and they 

 will root in a few weeks. After they are rooted, place 

 them in a greenhouse with a night temperature of 

 about 55, allowing a rise of 20 in the middle of the day. 

 Pinch the heart out as soon as they begin to grow, and a 

 few days after they have been cut back, move them into 

 a pot about 3 inches larger. A good fibrous loam may 

 now be used for all future pottings, and as the plants 

 get stronger about a third of sheep-manure may be 

 added, also a little sharp sand and charcoal, to keep the 

 soil sweet and porous. Give plenty of light at all times, 

 but avoid strong sunshine. Give plenty of water, and 

 syringe the under side of the foliage to prevent red- 

 spider, which is about the only insect that is trouble- 



3807. Tibouchina semidecandra. (XJs) 



