ISATIS (r 



the D\ er s W c ul / 



longer ad\ ertistil Csesar rel i 



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1184 Isoloma Tydsea ( 



ancient Britons used the Woid for stammg their bodies 

 and the word Britain itself comes from an old Celtic 

 word meaning painted. Before indigo became common 

 in Europe, the Dyer's Woad produced the chief blue 

 coloring matter for woolen cloth. The introduction of 

 indigo in the seventeenth century destroyed this im- 

 portant industry, not without opposition. Dioscorides 

 and Pliny mention both the Dyer's Woadjind indigo. 



/. tincldrta, Linn., is rather tall, glabrous and glau- 

 cous: stem-lvs. lanceolate, entire, sessile, somewhat ar- 

 row-shaped: fls. small, yellow, borne in early summer, 

 on panicled racemes. Instead of apod, opening length- 

 wise by valves, it has a closed fruit like on the samara 

 of an ash, 1-celled, 1-seeded. indehiscent, wing-like. It 

 is a biennial, and common in Europe. 



ISOLOJIA 



ith them to the base of the column, somewhat sigmoid 

 1 w tliL nil 1 lie column erect, long, without wings: 

 Umi I 4 VI ut J species in Braz., Hex., and W. Ind. 

 lineiris R Ii Slender, 1-1}^ ft.high, leafy: Ivs. dis- 

 1 u Im ir tiiite obtuse, emarginate, l}a in. long: 

 . 1 UM It I ruL in a short, terminal spike. March, 

 nd trees in thick woods, Jamaica, 

 Trinidad, Brazil, etc B K. 9:745. L. B.C. 14:1341. 



H. Hasselbring. 

 IS6LEPIS. See Scirpus. 



ISOLOMA (equal border). Gesner- 

 Imludes Tydma. Sixty or more 

 ti I } 1 American plants, very closely 

 illied to Gesneria and Aohiraenes. 

 From Gesneria distinguished by ab- 

 sence of well-formed tubers and char- 

 acters of capsule and anthers, and the 

 5 lobes of the disk equal; from Achim- 

 enes in the more tubular flowers and 

 lobed disk. The culture is the same 

 as for \chimenes and Gesneria. Seeds 

 of the newer hybrids germinatequickly, 

 an 1 plants bloom the same year. It is 

 prj) il le that the pure species are not 

 in the trade. Like Achiraenes, Ges- 

 neria and Gloxinia, they have been 

 much hybridized and varied. It is 

 probable that they are hybridized with 

 Achimenes and Gesneria. Tydsea is a 

 garden genus. It is not known how 

 the current forms have originated, 

 'some of the recent ones have fringed 

 fls (&n. 55:1223). 



Tydsea [AchimHcsplcta, Benth. Ttj- 

 (li I j Ufa, Dene.). Fig. 1184. One to 2 

 ft hiiry: Ivs. cordate-ovate, coarsely 

 sen ite spotted and reticulated with 

 pale gieeu or silvery green, with a 

 bioad light zone down the center: fls. 

 single on long, axillary stems, nod- 

 ding, the orifice oblique and lobes ob- 

 tuse the upper longitudinal half of the 

 fl red, the lower half yellow and red- 

 spotted. Colombia. B.M. 4126 (adapted 

 m Fig 1184). B.K. 31:42. F.S. 1:17- 

 18 —On this species Decaisne founded 

 the genus Tydiea in 1848. This species 

 has been called Isoloma pictum, but 

 this name was taken by Planchon in 

 IsoO to '51 for the Gesneria picia of 

 Hook which is a very different plant. 

 See PS. 6:586. B.M. 4431. This latter 

 plant the first Isoloma pictum, is ap- 

 parently not in commerce. 



{Tiid(ea amdbilis. Planch. & Lind.). 

 ire or less tapering to the 



ISCHARUM. 





ISNAEDIA. Includes a few species of Lwdwigia. 



ISOCHtLUS (Greek, a^Man/p). OrchidAceee. A genus 

 of no commercial value. Plants epiphytic, with tall, 

 slender, leafy stems, without pseudobulbs, bearing a few 

 small fls. at the summit. Sepals erect, free, keeled; pet- 

 als similar but plane ; labellum like the petals and united 



^^..^in^ 



~k. ^ ^'^ 



-^ 



Jaliscanum (XK). 



petiole, bluntly serrate, purplish on the veins: fls. 

 hairy, pendent, dark rose dotted with purple, paler inside. 

 Colombia. B.M. 4999. R.H. 1859, p. 25. F.S. 10:1070. 



