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WAHLENBERGIA (named after Georg Wahlen- 

 berg, 1780-1851, Swedish botanist). Including Edraian- 

 thus (Hedrsanthus). Campanulacese. Annual or peren- 

 nial herbs, base of the stems sometimes woody, used as 

 greenhouse and border plants, mostly the latter. 



Leaves alternate, rarely opposite: mfl. usually irregu- 

 larly centrifugal; peduncles terminal, lateral or axil- 

 lary, solitary or rarely paniculate: fls. usually blue and 

 nodding; calyx-tube adnate, hemispherical, turbinate 

 or obconical-oblong, limb 5-parted, very rarely 3-4- 

 merous; corolla campanulate, funnel-shaped, tubular 

 or rather rotate, 5-cleft, very rarely 3 4-cleft; ovary 

 inferior or semi-superior, 2-5-celled: caps, erect, 

 loculicidally 5-valved. About 110 species, Eu., Medit. 

 region, S. Afr., and Trop. Amer. This treatment 

 includes Edraianthus, which is often kept as a distinct 

 genus. The species are used 

 mostly as rock - garden 

 plants, and receive the 

 treatment given campan- 

 ulas. 



A. Plants with clustered 

 tubers. 



tuberdsa, Hook. f. Gla- 

 brous, with clustered, above- 

 ground tubers: sts. slen- 

 der, erect, 6-24 in. high, 

 branched and leafy: Ivs. 

 about 1 in. long, linear, acute 

 or obtuse, dentate, 1-neryed : 

 fls. in a terminal panicle, 

 white, red - purple - veined ; 

 calyx-lobes linear, spread- 

 ing; corolla campanulate, 

 lobes short and recurved. Island of Juan Fernandez. 

 B.M. 6155. G.Z. 21, p. 217. 



AA. Plants without clustered tubers. 

 B. Lrs. basal clustered, narrow: plants perennial. (Sec- 

 tion Edraiantha.) 

 c. Fls. solitary on the peduncles. 



serpyllifolia, G. Beck (Campdnula serpyllifblia, Vis. 

 Edraianthus serpyUifolius, A. DC.). Fig. 3971. Sts. 

 cespitose, procumbent, glabrous: Ivs. oblong-lanceolate, 

 obtuse, ciliate: fls. solitary, on sts. about 2 in. high, 

 deep purple; calyx-tube ovoid, rather glabrous, lobes 

 ovate-lanceolate; corolla campanulate. Dalmatia. G.C. 

 III. 45:243. G. 36: 143. Gn. 75, p. 103. Var. dinarica, 

 Hort. (W. dinarica, Hort.), has narrow silvery Ivs. and 

 blue fls. G.M. 58:285. Var. major, Hort,, is slightly 

 larger than the type. Gn. 78, p. 338. 



cc. Fls. several to numerous on the peduncles. 

 dalmatica, A. DC. (Edraianthus dalmdticus, A. DC.). 

 Sts. ascending or erect, about 3 in. high, glabrous: Ivs. 

 linear-lanceolate, entire, hairy-ciliate, 1-2 in. long: fls. 

 in a terminal 6"-10-fld. head, blue; calyx-tube rather 

 pilose, lobes triangular; corolla-lobes acute. Dalmatia. 

 G. 36: 142. 



Pumffio, A. DC. (Edraianthus Pumitio, A. DC.). 

 Cespitose: sts. very short, leafy: Ivs. linear, entire, 

 about Kin. long, glabrous beneath, pilose above: fls. 

 numerous, azure-blue; calyx-tube obconical, glabrous, 

 lobes If .-like; corolla-lobes ovate, acute. Dalmatia. 

 G.C. III. 53:59. G.W. 15, p. 345. 



3971. Wahlenbergia 



BB. Lvs. alternate or opposite and narrow, scattered along 

 the sts.: plants usually annual. 



c. Blades nearly rotund. 



hederacea, Reichb. Sts. filiform, creeping or ascend- 

 ing, branched, 4-10 in. long: Ivs. long-petioled, cordate, 

 obtuse, 5-7-angled, nearly rotund, about J^in. diam.: 

 fls. few, terminal, pale blue-lilac; calyx glabrous, tube 

 hemispherical, lobes linear-subulate; corolla-lobes ovate, 

 acute. Eu. 



cc. Blades linear to lanceolate or narrowly obovate. 

 gratilis, Schrad. (W. vincaeflora, Decne.). Sts. simple 

 or branched, 6-12 in. high, erect or somewhat decum 

 bent: Ivs. alternate or subopposite, linear-lanceolate, 

 sinuate-dentate, about Kin. long: peduncles terminal 

 or axillary: fls. blue; calyx rather glabrous, tube ovoid, 

 lobes acuminate; corolla- 

 lobes ovate, acute. Tropi- 

 cal and south temperate 

 regions of the Old World. 

 G.C. HI. 52:215. 



saricola, A. DC. Sts. 

 short, tufted, 1 in. or more 

 long: Ivs. clustered, peti- 

 oled, obovate or spatulate 

 to almost linear, Yr~\ in. 

 long: scapes 1-flcl., 2-6 in. 

 high: fls. white, veined with 

 blue; calyx glabrous, lobes 

 narrow-triangular; corolla- 

 tube purplish outside, lobes 

 oblong, broadly deltoid, 

 acute. Tasmania. G.37:21. 

 serpyllifolia. (XJ Gn 35, p. 269. 



W. gentianotdes, Hort., is offered in the trade as a rock-plant 

 growing a foot high, with erect wiry sts. and bright blue fls. W. 

 grandifldra, Schrad., is Platycodon grandiflorum. 



F. TRACT HTJBBARD. 



WATTZIA (F. A. C. Waitz, born 1768, at Schaum- 

 burg, Germany, state physician to the Dutch at Sama- 

 rang, Java; wrote on Javanese plants). Composite. 

 Includes one of the rarer "everlasting flowers," a half- 

 hardy annual which bears flat-topped clusters of yellow 

 flower-heads, with a golden disk. 



Mostly fmpiials: Ivs. alternate, linear or nearly so: 

 fl. -heads in terminal corymbs or rarely in oblong leafy 

 racemes: involucre various in outline, the bracts over- 

 lapping in many rows, all colored and petal-like: 

 receptacle flat, without scales: anthers provided with 

 tails of very small size: achenes somewhat compressed, 

 glabrous or papillose, terminating in a slender beak; 

 pappus of capillary bristles usually cohering at the 

 base, simple, barbellate or plumose. Seven species 

 from Austral. The genus is distinguished from Helip- 

 terum and Helichrysum by the beaked achenes. 



grandiflora, Naudin. Half-hardy everlasting or "im- 

 mortelle," annual, exceeding 18 in. height: Ivs. lanceo- 

 late, long-acuminate, sessile, green above, slightly vil- 

 lous beneath, prominent midrib beneath: fls. yellow, in 

 terminal corymbs; clusters about 5 in. across, and 

 heads 2 in. across, the showy part being the involucral 

 bracts, which are arranged in 4 or 5 series, and are 

 petal-like in character but of stiffer texture than ordi- 

 nary petals. F. 1865:41, where it was originally 

 described. Probably the most desirable of the genus. 



(3495) 



