OXALIS 



OXYDENDRUM 



2419 



wedge-shaped, notched: fls. white, margined with red, 

 yellow below. Cape. B.M. 155. F.S. 8:834. 



21. hirta, Linn. (0. fulgida, Lindl. O. hirtella, Jacq. 

 O. multiflbra, Jacq. O. rosdcea, Jacq. 0. rubella, Jacq.). 

 Weak and spreading, hairy; Ivs. nearly sessile, 

 scattered; Ifts. small, oblanceolate or spatu- 

 late, acute: fls. deep rose-color to lavender. 

 Cape. B.R. 1073. B.M. 1031. L.B.C. 3:213. 



(Gardenia). They are remarkable for their extremely 

 long and slender corolla-tubes, which are topped by a 

 five-pointed star of spreading narrow lobes. 



Leaves opposite: fls. usually white, in axillary racemes 

 or panicles; calyx-tube truncate, or 

 with 5 short teeth ; corolla salver-shaped, 

 throat glabrous; stamens 5, inserted at 

 the mouth of the tube; ovary 2-celled, 

 except in 1 species; style usually ex- 

 serted; stigma usually spindle-shaped 

 or club-shaped, 2-cut at the top; ovules 

 numerous, not immersed in the 2 fleshy 

 placentae: fr. a sort of berry. Species 

 30-40, mostly in Trop. Afr., some in 

 S. Afr. 



2690. Leaves of Oxalis Bowiei, showing day and night positions. 



0. japonica, Franch. & Sav. Lfts. broadly triangular, scarcely 

 notched, and truncate. Otherwise similar to O. Acetosella. Japan. 

 O. violacea, Linn. Lvs. rather fleshy, glabrous: fls. in simple 

 umbels, rose-violet. E. U. S. B.M. 2215. Mn. 5:121. Scarcely 

 useful, except for hardy borders or rockeries. 



WILLIAM TRELEASE. 



OXERA (meaning dubious, probably referring to 

 sourness). Verbenacese. Shrubby often climbing plants, 

 useful for growing under glass for the showy flowers, 

 but little known horticulturally. 



Leaves opposite, entire, leathery: fls. whitish or yel- 

 lowish, in twice- or thrice-forked cymes, varying 

 greatly in form of calyx and corolla, but the latter 

 always 4-lobed, and wide-throated: drupes 4-parted or 

 by abortion reduced to a single segm. Species about 

 two dozen, New Caledonia. 



pulchella, Labill. Lvs. 2-5 in. long, stalked, the lower 

 ones oblong-lanceolate: calyx conspicuous, loose, com- 

 posed of 4 more or less united greenish yellow sepals, 

 each Yz- z A\n. long. B.M. 6938. Gn. 33:510; 45, p. 

 333. I.H. 36:76. J.H. III. 30:33; 42:39; 55:521. 

 G.C. III. 3:209. R.H. 1890, p. 274. Once offered by 

 John Saul, Washington, D. C. Also cult, outdoors in 

 S. Calif. It needs but a glance at any of the colored 

 portraits of 0. pulchella to see that it is one of the most 

 interesting climbers cult, in hothouses. It has ivory- 

 white trumpet-shaped sweet-scented fls. 2 in. long and 

 1 in. across, borne profusely in clusters of a dozen or 

 more. A plant 2 years old from cuttings will clothe the 

 rafters and bloom freely, the weight of the clusters 

 causing the fls. to droop gracefully. The prominent 

 calyx suggests Clerodendron Thompsons, a near rela- 

 tive. As the corolla-tube leaves the calyx, it makes a 

 bend and then broadens into a funnel-shaped fl., with 

 the 4 lobes scarcely spreading. The appearance of the 

 fls. is enhanced by the long style and the 2 stamens, 

 which are thrust out and strongly curved. It is reported 

 as thriving in a winter temperature of 55-60 ; it requires 

 a warmer place than the ordinary greenhouse. It 

 blooms well in the winter months. It prop, readily by 

 cuttings placed around the side of a pot ; also from seeds, 

 which it matures in considerable numbers. 



WILHELM MILLER. 

 L. H. B.f 



OX-EYE: in America, Heliopsis; in Europe, Buphthalmum. Ox- 

 eye daisy: Chrysanthemum Leucanthemum and Rudbeckia hirta. 



OXLIP: Primula elatior. 



OXYANTHUS (Greek, sharp flower; referring to the 

 acute lobes of the corolla and calyx). Rubidceae. 

 African trees and shrubs, allied to the cape jasmine 



natalensis, Sond. Branches, Ivs. and 

 calyx glabrous: Ivs. elliptic-oblong or 

 ovate-lanceolate, shortly acuminate, 

 entire, 7-8 in. long, 3 in. wide: racemes 

 axillary, loosely 16-20-fld.; fls. white, 

 fragrant; corolla-tube about half the 

 length of the Ivs. Wet places in woods, 

 Natal. Cult, outdoors in S. Fla., and 

 in Eu. under glass. 



isthmia, Hort. Described as a 



splendid flowering shrub in S. Fla., similar to the above 



but with larger calyces and possibly more fragrance. 



Probably S. American, and requiring further study. 



The name is not identified botanically. 



0. tubifldrus, DC. (Gardenia tubiflora, Andr.). Hispidulous- 

 puberulous: Ivs. obtusely rounded or somewhat eared at the base: 

 fls. 6-7 in. long, at first creamy white, then tawny or ochrous: fr. 

 terete, not grooved. Trop. Afr. F.S. 7:737. B.M. 1992 (as 0. 

 speciosus) 4636. J.F. 3:245. WlLHELM MlLLER. 



L. H. B.f 



OXYDENDRUM (Greek, sour tree; from the acid 

 taste of the foliage). Also written Oxydendron. Eri- 

 cdcese. SOUR-WOOD or SORREL-TREE. Ornamental tree 



2691. Oxalis cernua. 



grown for its white flowers appearing in summer and 

 the handsome foliage turning scarlet in autumn. 



Deciduous: Ivs. alternate, petioled, serrulate: fls. 

 whitish in terminal panicles composed of 6 or more 



