ISONANDRA 



ITEA 



1707 



lobes; stamens 12; ovary 6-celled, becoming a small 

 ovoid berry with 1 or 2 seeds: tree 40 ft. This is 

 scarcely a horticultural subject. Malaya. R.H. 1898, 

 p. 441. 



ISOPYRUM (from the Greek for like, and wheat, 

 as the seeds resemble those of wheat). Ranunculacese. 

 Dwarf stemless herbs sometimes used in the wild gar- 

 den. Annual, or rootstock perennial: Ivs. decompound, 



1999. Isoloma jaliscanum. 



ternate; Ifts. 3-lobed or cut, membranous: fls. white, 

 regular, few or solitary, on slender scapes; sepals 5-6, 

 deciduous; petals 5, very small or wanting: carpels 2-20, 

 sessile; ovules 3 or more. Fifteen to 20 species intem- 

 perate regions of the northern hemisphere. I. thalictroi- 

 des, Linn., is cult, in alpine gardens, and has graceful 

 foliage resembling a maidenhair fern. Six to 12 in. high: 

 rootstock creeping: cauline Ivs. alternate, 3-lobed or 

 3-foliolate: fls. white, resembling an anemone, in few- 

 fid. terminal panicles; sepals oval, obtuse. W. Hima- 

 layas. April, May. Thrives in any good garden soil. 

 Prop, by seeds or by division of the roots in autumn. 

 Very ornamental and good in masses. I. grandiflorum, 

 Fisch. Lvs. long-petioled; Ifts. small, 2-3-lobed: scapes 

 3-4 in., equaling the Ivs.; fl. solitary, 1-1 Y in. diam. 

 Himalayas. G.C. III. 50:396. L. H. B. 



ISOTOMA (Greek, equally cut or divided; referring to 

 the corolla, and true only by contrast with Lobelia). 

 Campanulaceae. Lobelia-like herbs, but with an 

 entire corolla-tube (or only partially slit), and stamens 

 attached near the top of the corolla: lobes of corolla 

 5 and nearly equal, spreading; upper anthers with 

 terminal tufts: fls. solitary or in racemes, blue, purple 

 or white (at least in the cult, species): Ivs. alternate, 

 entire, dentate or pinnatifid or even twice-pinnatifid: 

 plants of various habit, some species erect, others 

 creeping or acaulescent; annual or perennial. Species 

 8, of which 6 are Australian, 1 W. Indian, and 1 in the 

 Society Isls. 



axillaris, Lindl. Perennial, flowering the first year so 

 as to appear annual, but forming at length a hard root- 

 stock, erect, with few spreading branches, 6-12 in. : Ivs. 

 linear, irregularly pinnatifid, 2-3 in. long, lobes linear: 

 pedicels axillary, 2-6 in. long; fls. large, bluish purple, 

 pale outside. Austral. B.M. 2702 (as Lobelia sene- 

 doides) and 5073 (as Isotoma senecioides var. subjrin- 

 natifida, which has the lobes again more or less pinnati- 

 fid). B.R. 964. Probably not now in cult. 



petraea, F. Muell. Like the above, except that the 

 Ivs. are ovate-oblong or elliptical, with linear or lanceo- 

 late teeth or lobes which are not longer than the breadth 

 of the body of the blade. Austral. The plant in the 

 trade is said to have cream-colored fls., and is sold as a 

 "lemon verbena," a name which properly belongs to 

 Lippia citriodora. L. H. B. 



ISOTRIA (Greek, in equal threes'). Orchidacese. 

 Terrestrial plants, with elongated fleshy roots, and 

 scapose stem with a whorl of leaf-like terminal bracts. 



Flowers solitary or in 2's, erect or ascending; sepals 

 narrow, about equal, longer than petals; lip somewhat 

 3-lobed, spurless, erect, crested; pollina 2, powdery- 

 granular, tailless. Species 2, E. U. S. See Pogonia. 



verticillata, Raf. (Pogonia vertidllata, Nutt.). Scapes 

 8-16 in. tall; bracts elliptic to oval, abruptly acumi- 

 nate; sepals linear, 1-2 in. long, longer than the linear 

 petals; lip erect, 3-lobed. E. U. S. B.B. 1:468. 



GEORGE V. NASH. 



ISOTtPUS: Onoseris. 



ITEA (Greek name of the willow, applied here 

 because it has willow-like leaves, or perhaps because it 

 grows near the water). Saxifragacese; by some placed 

 in a separate family, Iteacese. Trees and shrubs, num- 

 bering about 6 species, inhabiting tropical and sub- 

 tropical Asia, and one of them in North America, 

 I. virginica, a low, upright, somewhat coarse shrub, 

 best known by its long, erect racemes of small white 

 flowers appearing about July 1, in Massachusetts, and 

 its brilliant autumn coloring. 



The genus is characterized by alternate, narrow Ivs., 

 fls. in simple racemes which are terminal or axillary, 

 white: calyx 5-toothed, with persistent lobes; petals 5, 

 very narrow; stamens 5; ovary oblong, 2-celled: fr. a 

 very narrow or a conical caps., which is 2-grooved, 

 2-parted when mature: some of the species are ever- 

 green. 



virginica, Linn. VIRGINIAN WILLOW. Fig. 2000. A 

 shrub, 1 J^-6 ft. high, usually not more than 2-3 ft. high, 

 of upright, somewhat slender habit: Ivs. deciduous, 

 alternate, oblong, pointed, minutely serrate, smooth 

 green above, pale and slightly pubescent below, 

 petioled, without stipules, 1-3 in. long: fls. fragrant, 



2000. Itea virginica. ( X M) 



