LABURNUM 



partly shaded positions as in sunny ones. Prop, by 

 seeds, sown usually in spring, and also by layers ; 

 Ibe vars. are mostly grafted or budiled on seedliii^s of 

 ODD of the species. Tliree species in S. Europe and W. 

 Asia, often included under Cytisus. Lvs. exstipulate; 

 tls. slender-pedicelled, in terniinal simple racemes, 

 mostly pendulous ; calyx 2-lipped, with obtuse, short 

 lips; corolla papilionaceous, witli the petals all distinct: 

 ovary stalked: fr. a linear pod witli se\eral seeds, com- 

 pressed, tardily dehiscent; seed witljout appendage at 

 the base. All parts of tlie Y)lants are poisonous, espe- 

 cially the young fruits. The hard, tough and close- 

 grained wood is susceptible of a very fine polish, and is 

 manufactured into various small articles. Consult 6'.//- 

 tisiix, Genista and Petteria for names not found in this 

 genus. 



vulgare, Griseb. {L. aiutfjijroirh'x. Medic. Cfilixns 

 rjalnirniiiit, L,inii.). Golden Chain. Bean Tree. Fig. 

 1219. L;irge shrub or small tree, to 20 ft., with erect or 

 spreading branches : branclilets appressed-pubescent, 

 grayish green: lvs. long-petioled; Ifts. elliptic or ellip- 

 Tic-ovate, usually obtuse and mucronulate, glaucous- 

 green and appressed-silky pubescent beneath when 

 young, 1-1'4 in. long : racemes silky-pubescent, 4-8 in. 

 long: fis. about % in. long: pod appressed-pubescent, 

 with thick peel, about 2 in. long ; seeds black. May, 

 •Tune. S. Europe. Gn. 2.5, p. 518 ; 34, p. 30, and .51, p. 



■jf|o There are manv garden forms, as var. atireum, 



kort., with yellow foliage, F.S. 21:2242-43; var. bul- 

 iitum, 0. Koch (var. involntum, Hort.), with curled 



LAC.ENA 



865 



1219. Golden Chain. Laburnum vulgare (XJ'x 



ifts. ; var. CarliSri, C. Koch, with very small and narrow 

 Ifts. and long and slender racemes; var. p6nduluin, C. 

 Koch, with pendulous branches, Gn. 25, p. 522 : var. 

 quercii61ium, C. Koch, withsinuately lobedlfts., fan. L.t. 

 p. 520 and 34, p. 30; var. sessilifdllum, C. Koch, with 

 crowded, sessile lvs. 



alplnum, Griseb. (Cf/tisus aJphuis, Mill.). .Scotch 

 Laburnum. Shrub or tree, to 30 ft., similar to the for- 

 mer: branchlets glabrous or hirsute when young: Ifts. 

 usually elliptic, acute, pale green and glabrous beneath 

 or sparingly hirsute, ciliate, l-V'i in. long; racemes 

 long and slender, glabrous or sparingly hirsute: fls. 

 smaller: pod thin, with the upper suture winged, gla- 

 brous; seed brown. June. Mts., S. Europe. IJ.iM. 17G 

 (as difisiis Labiir)iiim). (.40.25, p. 519 aiul 34, i>. 30.— 

 This species flowers aliout two weeks later than the for- 

 mer, and has much longer and more slender racemes; it 

 also is of more upright and stiffer growth and hardier. 



Watereri, Dipp. (L. Pdrksi I, Hort. C. alplntisy.vul- 

 f/«»'i.s. Wittst.). Hybrid of garden origin, but found 

 also wild. Lvs. beneath and racemes sparingly pubes- 

 cent: racemes long and slender: pod with narrow wing, 

 sparingly appressed-pubescent. — As hardy as X. alpi- 

 nnm and sometimes considered to be a variety of that 

 species. 



Adaml, Kirchn. {C Adami, Foit. C. Laburnum pitr- 

 pnnisri'Hs, Loud. X. vubjdrex Cijfistis pnrpureus). 

 I'robably graft-liybrid, originated at Vitry, near Paris, 

 about 182G. Haliit and foliage usually almost like i. 

 vulrjure, but Hs. dull purplish, rarely yellow; sometimes 

 bearing a few branches with the Hs. and lvs. of C'ylisiis 

 piirpurens. A very interesting form, but of less orna- 

 mental value. 1:5. R. 23:1905. B.H. 21:16-18. -Much dis- 

 cussed by Darwin and others as an example of graft- 

 hybridism. 



L. Caramanicv m . Benth. & Hoolj. (Podocytisus Caramani- 

 cus, lioiss.). Krect shrub, to 4 ft., much resembling in foliage 

 and liabit the Cytisus sessilifolius, with long and slender ter- 

 minal upright racemes. ,luly-.Sept. Asia Minor. R.H. 18C1. 

 p. 410,-1/. fragrans, Griseb., L. ramentaceum , C. Koch, and 

 A. WiHdL'ni, Lavall.=Petteria ramentacea. 



Alfred Rehder. 



LABYRINTHS or mazes are still kept up in some Old 

 World gardens as relics of the past. They were popu- 

 lar in the sixteenth and seventeenth centuries. Fig. 

 1220 is the plan of an English Labyrinth of two centu- 

 ries ago. It would be vandalism to destroy so fine an 

 example of a style of gardening no longer fashionable, 

 but folly to copy it in a modern garden. IMazes are 

 made of' clipped evergreens of various kinds. 



LAC3;NA (one of the names of Helen, which Lindley 

 states may be applied to this phmt on account of its 

 beauty, a compliment which the plant does not at all 

 merit; but he adds it may also be derived from Lakis, a 

 cleft, alluding to the divisions of the lip, but this deri- 

 vation is impossible). On-hiddcecn. A little-known ge- 

 nus containing only 2 species inhabiting Central Amer. 

 Pseudobulbs rather long, ovoid, smooth at first: lvs. 

 large, elliptic-pointed and contracted into a petiole, pli- 

 cate venose: raceme pendent from the base of the pseu- 

 dobulbs, loose, bearing up to 10 medium-sized fis. : 

 sepals and petals nearly equal, elliptical, half-spread- 

 ing- labelluni equaling the petals, articulated to the base 

 of the column, clawed, with the lateral lobes incurved, 

 terminal larger, spreading and narrowed at the base to 

 abroad claw: column rather long, winged, hooded at the 

 top; poUinia 2 on a simple stipe. 



The plants should be grown in baskets or on blocks 

 of wood likeStanhopeas: if potted the racemes are likely 

 to bury themselves in the soil. At the end of October 

 water should be almost entirely withheld for a few 

 weeks. The flower-stalks appear in spring. 



blcolor, Lindl. Racemes drooping, about 18 in. long, 

 bearing 9 or 10 Hs. The tts. are greenish yellow, covered 

 externallv with short hairs ; petals with :( purple streaks; 

 labellumhairv. spotted wilh purple. Discovered about 

 1843 in Guatemala, atanjjlevation of 7,000 ft. B.ti. 3U:oU. 

 -Var. 

 creamy 



spectAbilis, Reiclib. f. Fls. about 1 in. in diam., whit- 

 ish, suffused with pink and speckled wuh purple; 

 sepals concave orlncular ; petals smaller connivent. 

 B.M. 0510. -Far more handsome than the former, but 

 not advertised in America. 



Heixkich Hasselbking. 



T (Tuatemaia, ar an eievauuu i,i , ,«„« i^. "■"■ 



. glabr^ta, Lera. Fls. everywhere nearly glabrous, 

 ly white. Not in the American trade. I. H. 1:33. 



