THUNBEKGIA 



TIIUN'HERGIA 



179!) 



sion: Ivs. oppn>-;ito: fls. blue, yellow, purjilr or wliiTi'. 

 oUtarv mill ;i\illary vv in racemes; calvx annular ami 

 caroely lolx'.l or t.K.tlietl or li>-ir.-t(.otliVd. surr.Muulr.l 

 by 2 large braets wliii-h often inelose alsi* tlio oornlla- 

 tube; corolla trumpet - shaped, witb a spreadini;- limit, 

 tube curved or oblique, often compressed, enlari^^ed 

 toward tin- nmuth; stamens 4, didynanmus. fixed m-ar 

 the base of the tube, filaments fUirkrncd at the liaso. 



2500. Thunbergia alata (X y 



separate; anther-cells parallel, et[ual, nn>stl}" nuuTonate 

 at the base: ovary seated on a tieshy disk, 2-loculed. 

 each cell with '2 ovules (rarely only one). The Thun- 

 bergiej© are distinguished by the contorted corolla, the 

 4-seeded capsule, and the globose seeds. 



The Thunbergias are nearly all vigorous greenhouse 

 cliiiibers resemltliug allamandas in haliit. In large con- 

 servatories where they are not cramped for room the}' 

 flower freely and display their tlowers to the best ad- 

 vantage. Severe pruning, which is necessary in small 

 greenhouses, prevents the production of tlowers. The 

 farger species, T. lanrifojm , T. af/'ini>:, T. grandifJora , 

 T. Mji^tor^'usix , ami 2\ eoecinea are rapid growers, re- 

 quiring plenty of feeding and root-room. All do better 

 ia open beds than in pots. They may be propagated 

 either from seeds or by cuttings which are taken from 

 the young wood which starts into growth after the 

 plants have been cut back during winter. These pro- 

 duce few flowers the following autumn, but bloom 

 freely the second season. As a rule, the plants flower 

 in late summer or autumn, but this may be made to 

 vary according to treatment in some species. 2\ aJiita 

 and its varieties and T. fragrans are often treated as 

 annual garden plants, flowering in late summer. T. 

 erecta and T. affiiiis when grown in pots form rather 

 compact shrubby plants. See Gn. 24, p. 'M4; HO, p. 202; 

 47. p. LiO. T. e'/rtpni.'^ of the trade cannot be accounted 

 for by the writer. Heinrioh Hasselbrixo. 



Tlinnbergias ami allamandas are great favorites in 

 central and southern Florida, being used on verandas, 

 arbors, small trees, old stumps, trellises and buildinics. 

 Of the blue-fld. kinds T. grandiflom is hardiest and 

 commonest. It has large, heart-shaped leaves which 

 overlap one another in a charming nninner. It blooms 

 from September till Christmas, the fls. lieing light blue 

 and rather dull as coni])ared with the next. The form of 

 T. JanrifoJirr, known to the trade as T. IToi-rUii, has 

 nearly sky-blue fls., of a deeper but brighter hue than 

 the preceding. It is a taller-growing and choicer plant, 

 and has 10 or more fls. in a raceme, while those of T. 

 <jr<-{}\<ll flora are solitary in the axils. T. frniirmi^: is tln' 

 common white-fl<l. kind. The form cult, in Fh)rida is 

 probal)ly var. vi'sfita , as the blossoms are not fragrant. 



T. aJafa is a general favorite. The fls. range from 

 buff and white to orange with a deop purplish brown 

 throat, the hist form being the most popular. This spe- 

 i"ie-! is killed to the ground by sharp frost every winter 

 but sprouts vigorously the folb^wing s]n'ing. It also 

 comes up from self-sown s.-ed. This sjiecies trrows 

 only 7 or 8 ft. high. All tine Thuid-crgias mentioned 



al'ore ;ire easily raised fi-oni euttin^-'s or layers jn suni- 

 noT. 7'. (')-rr/(i is n<.t. a clhnl.er hut lias a sonn'wiiat 

 str;i-gling habit. It has simdl, ,|ai-k ^^Vi-vn l\s. and 

 large, dee|. pnrplisli him- ^H.ixinia-like fls. which am 

 M'hite at the base. There is a imre white variety of it. 

 It blooms all summcL' and autumn. It is readily" raised 

 froiu ruitings during t,hi> ralnv season. 



H. Neiiiclinu- 

 inI)i:k. 



albiLis, 1, cncrjne;!, II- HnrrisH 7 



;il.'ita., -1. ra-rule;,,, 4. inlvs-allH^. '1 



.■ill'a, -1. 4 Do.liLsii, -J. laurilnba, 7. 



alhithn-n. -2. en.Tt;i, t, kitiM. 'J. 



;niraiiti;ir;i, 7. frai,'i-;ins. ::, Mysorensis, H. 



i:,irl.rrn , L' Fr,\-.T), '_'. sulphurea, 2. 



bakiTi, -. i,'ranilillnr;i, it, 7. unicolor, 2. 

 rhry^sops, ,"', 



A. FU. (ij-iJlarij, sol/'lan/. 



n- A''.^-- nitire ' ]. alfinia 



l-.B. Lrs. aiiijnUiyhi ln„lhr,l. 



r. P.'tiuh's :r'nnjr<l 2. alata 



or. PffioJrs uot >rl,n/r,/. 



D. Co/or of fls. irhilv : roroUa- 

 Inb'^v fntiHUih' ,i,nj sinu'ifrh/ 



ioolhiul at the iiju'.r :;. fragrans 



DD. C'^Ior of f/.s. hliii' [ivhite on] II 

 ill varieties). 



E. Plant sahereef 4. erecta 



EE. Plant eUmhiiiij. 



F. Tliroaf of /he enrolla l/ellon•.^^. chrysops 

 PF. TJiroaf of f/,r •■orolla ivli)feS>. gTandiflora 

 AA. Fls. in terminal or axill(eri) racenies 

 (see. also, T. tira iidi flora ) . 



p.. i'olor of fls. bhie 7. laurifolia 



v.H. C'oloy of fls. lie I loir ,s. Mysorensia 



BBB. Calor of fls. SCO rlel 1.1. coccinea 



1. aJfinis, S. Moore. A rambling shrub, \iw\-l ft. 

 high, smooth: branches 4-angled : Ivs. short-petioled. 

 elliptic, acute, entire: fls. 2 in. across, deep purple-blue, 

 with a yellow throat. Summer. Tropical Africa. B.M 

 0075. G.C. III. 2:461. (I.M. 32:201. -This ]tlant is 

 closely allied to T. erecta, from which it differs liy its 

 entire Ivs. and larger fls., which are about twice tlio 

 size of those of T. erecta. When grown in a ]iot the 

 plant forms a compact shrub, but when given more 

 room it is a rambling climber. 



2. alata, Bo.i. Fig. 2,i00. Stem square, climbing- 

 hairy: Ivs. opposite, triangular-ovate, hastate. re]iand- 

 toothed, rough-pubescent, tomentose beneath; petioles 

 winged, about as long as the Ivs.: fls. solitary, on 

 axillary peduncles; calyx very small, surrounded by 2 

 large inflated bracts; corolla-tube somewhat longer than 

 the involucre, dark purple within; limb rotate, obliifue, 

 of r-t nninded segments, buff or cream-cohu'ed. S.F. 

 Africa. B.M. 2591. P.M. 2:2. B. 5:238 (not good). 

 L.H.O. 11:1045.— A pei'ennial climber which may also 

 be treated as an annual greenhouse plant. Usually 

 pro|)a:;"ated V'V seeds. It is iised either as greenhouse 

 elimlier or to grow on trellises outdoors. Outsi<le 

 it flowers nirtstly in August. Itut b^' propagating at 

 various times they may be luid in l")lossom nearly the 

 whole year in the greenhouse. There are many varie- 

 ties, some of which have been described as species. 



Var. dlba, Paxt. {7\ ali'tfa. var. allnfUra , Hook.l. 

 Fls. white, with a blackish center. P.M. 3:28. B.i\[. 

 3r)!2. Var. aurantiaca, Ktze. (7'. aurant'inra , Paxt.l, 

 Fls. bright orange, with a dark center. The best of tln^ 

 efoui>. ^P.M. 6:269. 8ul)var. D6ddsii has variegated 

 Ivs. P.M. 15:221. F.S. 4:415. Var. B^keri, H<.rt. ( 7'. 

 Bal-rri or BacJcerii. Hort.). Fls. pure white. Var. 

 Fryeri. Hort. {T. Frfirri, Flort. T. alata, var. in/ns- 

 olha, Hort.). Pale oraiii,^e. with a white center. Var. 

 sulphurea, Hort. FN. sulfur-velb)W. Var. liitea. Hort. 

 {'r.ah'ilo, var. hnirolor, Hort.). Fls. entirely yellow. 



3. fr^grans, Eoxl>. Stem slender, climbing: \y.-. 

 lanceolate to triana'ular-ovate, cordate or ^ubcor<late, 

 nu)stly angularly toothed oji each side of the bas(-, 

 rough on both sides, petiojate: fls. white, axillary; 

 cornliadnbe narrow ; limb sj treading. 1 ^^ in. across, 

 lobes truncate and repandly toothed at the end. Su'.u- 

 mi'r. Inilia. 



