RHUS 



RHYNCHOSTYLIS 



2955 



infl. 2-3 >2 in. long. W.China. Var. quinqufjuga, Rehd. & Wilson. 

 Lfts. 5-11, slightly pubescent while young. W. China. R. hjjbrida, 

 Rehd. Hybrid between R. glabra and R. typhina, found occa- 

 sionally among the parents: young branchlets sparingly or densely 

 pubescent: Ifts. on the veins beneath slightly pubescent: hairs of 

 the fr. exactly intermediate in length between those of the parents. 

 R. orientalis, Schneid. (R. Toxicodendron var. hispida, Engl.). 

 Allied to R. Toricodendron. Climbing: young branchlets hairy: 

 Ifts. dull green above, entire: fr. pilose. Japan, China. R. 

 rhoddnthema, F. Muell.=Rhodosphaera rhodanthema. R. syhtstris, 

 Sieb. & Zucc. Allied to R. succedanea. Shrub or tree, to 30 ft.: 

 young branchlets, rachis, and Ifts. beneath pubescent. Japan, 

 China. S.I.F. 1:58. R. tomentdsa, Linn. Allied to R. la-vigata. 

 Shrub or small tree: Ifts. 3, oblong, entire or crenate-dentate, 



3400. Rhus glabra. 



tomentose beneath, 1 Jf-3 in. long. S. Afr. I.T. 3:111. R. tricho- 

 cdrpa, Miq. Allied to R. verniciflua. Shrub or small tree: petiole 

 and Ifts. beneath pubescent; Ifts. usually smaller: panicle shorter 

 and denser: fr. pilose. Japan, China. ALFRED REHDER. 



RHYNCHANTHUS (Greek, beak and flower, referring 

 to the peculiar shape of the fls.). Zingiberocex. Slender 

 glabrous perennial herbs with tuberous roots, suitable 

 for the warmhouse: sts. erect, leafy, the Ivs. sessile: 

 fls. sessile, borne in a terminal, few-fld. spike; bracts 

 solitary, elongate, and colored; calyx tubular, cylindri- 

 cal; corolla funnel-shaped, the lobes ovate-lanceolate, 

 acuminate, and erect; ovary 3-celled. About 3 or 4 

 species, Burma. R. Bluthianus, Wittm. Sts. up to 1 

 ft. high, not thickened at the roots: Ivs. 4, oblong- 

 lanceolate, sessile, acuminate, not marginate: fls. 2, up 

 to 2 in. long; calyx beautiful red, truncate, 3-toothed; 

 corolla red; ovary smooth. Burma. Gt. 48:1464. R. 

 Johnianus, Schlecht. Tuberous: up to 43^ ft. high: 

 Ivs. distichous, lanceolate, acuminate, both sides gla- 

 brous: infl. many-fld., oblong, with bright red, lanceo- 

 late, acuminate bracts; fls. sulfur-yellow; calyx 

 cylindrical, split, the apex 2-cleft; corolla 3-cleft to 

 below the middle, the segms. lanceolate, acuminate; 

 ovary cylindrical. Burma. Gt. 56:1560. R. longi- 

 fblius, Hook. f. Sts. \ 1 A ft. high, thickened at the 

 roots: Ivs. 8-12, regularly distichous, 5-7 in. long, 

 oblong-lanceolate, acuminate, red-margined: fls. 45, 

 up to 3 H in- long; calyx slightly shorter than the bracts; 

 corolla-tube pale yellow-green, lobes green ; ovary puber- 

 ulous. Burma. B.M. 6861. F. TRACY HUBBARD. 



RHYNCHOSIA (Greek, beak, alluding to the shape 

 of the keel). Leguminbsx. Twining, prostrate, or 

 rarely erect herbs, shrubs, or subshrubs, suitable for 

 the warmhouse or outdoors in the southernmost parts 

 of the United States. 



Plants often glanduliferous, with minute yellow 

 glands: Ivs. pinnately, or rarely subdigitately, 3- 

 divided: fls. yellow, mostly in axillary racemes; calyx 

 unequally 3-cleft or 4-5-parted; standard rounded, 

 often darkly lined, rarely purple: legume compressed 

 continuous. About 100 species in the warmer regions 

 of both hemispheres. The name Dolicholus is some- 

 times used for this genus, but Rhynchosia is one of the 

 names maintained by the "nomina conservanda" 

 accepted by the Vienna Congress. 



minima, DC. Tomentose or glabrescent herb: st. 

 about 1 ft. high, low, twining, obtuse-angled: Ifts. ovate- 

 rhomboid, rather acute: fls. racemose, distant; calyx- 

 lobes lanceolate-linear, the inferior about half as long as 

 corolla: legume not constricted, oblong, tapering at 

 the base, pubescent; seeds black. Texas, Mex. to Bra- 

 zil, W. Indies, Trop. Afr., and Asia. 



phaseoloides, DC. Tomentose or glabrate, a high 

 climber, subshrubby: st. twining and subcylindrical : 

 Ifts. ovate or ovate-rhomboid, pointed: racemes many- 

 fld.; calyx-lobes ovate-lanceolate or ovate, pointed, the 

 inferior half as long as the standard: legume constricted 

 between both seeds, tomentose or glabrescent; seeds 

 black, with a scarlet-yellow ring around the hilum. 

 Panama to Brazil, W. Indies and Galapagos Isls. 



F. TRACY HUBBARD. 



RHYNCHOSPERMUM (Greek, beak and seed, 

 referring to the form of the seed). Apocyndcese. Now 

 referred to Trachelospermum. R. jasmirufides, Lindl. = 

 Trachelospermum jasminoides, Lena., which see. There 

 is, however, a good botanical genus named Rhyn- 

 cospermum, but it belongs to the composite family. 

 It has only one species, R. verticillatum, a plant not in 

 cultivation. 



RHYNCH6SPORA: Rynchospora. 



RHYNCHOSTYLIS (Greek, beaked column or style). 

 Orchidaceae. Epiphytic herbs closely related to Sacco- 

 labium and usually sold under that name. 



Stems monopodial and 2-ranked: Ivs. crowded, 

 leathery or fleshy: fls. in dense racemes from the axils of 

 the Ivs., medium-sized; dorsal sepal and petals sub- 

 similar, lateral sepals broader, decurrent on the foot of 

 the column; labellum firmly joined to the base of the 

 column, obovate, inflexed at the apex, not 3-lobed, 

 spurred, the spur straight or curved backward. For 

 cult., see Saccolabium. 



retusa, Blume (Saccolabium guttatum, Lindl. S. 

 prsmorsum, Lindl. S. Rheedii, Wight. S. retusum, 

 Voigt. S. Blumei, Lindl.). St. stout, with channeled 

 Ivs. 6-20 in. long: fls. in dense, cylindrical racemes about 

 as long as the TVS., %in. across, white, blotched with 

 pink or violet. June, July. Trop. India and Malay Isls. 

 B.M. 4108. F.S. 7, p. 92; 14:1463, 1464. B.R. 1443 

 (as Sarcanthus guUatus). G.C. 1845:364; 11.1:219; 

 23:573; 111.15:812. Gn. 31, p. 537. A.G. 20:317. 

 S.H. 2, p. 375. Several varieties are in the trade. Var. 

 majus, Hort. Larger in all its parts. I.H. 15:545. 

 Gn. 31, p. 69; 36, p. 230 (all as Saccolabium Blumei var. 

 majus). Var. Holdfordiana, Hort., an old form with 

 large racemes of waxy white fls., spotted with crimson, 

 the lip being also crimson. Var. gigantea, Hort., very 

 much like the type. Var. alba, Hort. Fls. entirely 

 white. Var. Dayi and var. superba are offered. 



violacea, Reichb. f. (Saccolabium violaceum, Reichb. 

 f.). Lvs. 10-12 in. long: racemes 1 ft. or more long; fls. 

 1 in. across, white, spotted with pale mauve; labellum 

 dark violet. Jan. Philippines. B.R. 33: 30 (asVanda). 

 The blossoms are said to have a disagreeable odor. Var. 



