OXALIS 



OXYDENDRUM 



1183 



P..M. 237(as O. caprina). A double-fld. form naturalized 

 about the Mediterranean is also commonly cult. F.S. 

 19:1964. Both the single and double forms are fre- 

 quently but wrongly listed as O. lutea and O. flam. 

 and sometimes as O. caprina, and the popular name of 

 Bermuda Buttercup is becoming attached to them 



1603, Oxalis cernua. 



15. variabilis, Jacq. (O. varidbilis, var. albifldra, 

 Lindl. O. grandiflbra, Jacq. O. Idxula, Jacq. O.pur- 

 phrea, var. Idxula, Hort. O. rigidula, Jacq. O.suggil- 

 lata, Jacq.). Lvs. large, rather fleshy, sometimes pur- 

 plish, petioled: fls. large, white or slightly variegated 

 with rose color, yellowish at base. Cape. B.M. 1683. 



Var. rubra, Jacq. (O. purpurea, Jacq. O. specibsa, 

 Jacq. O. venusta, Lowe). Pis. rosy to deep rose-pur- 

 ple. Cape. B.R. 18:1505. B.M. 1712. 



16. hirta, Linn. (O. rosacea, Jacq. O. multifldra, 

 Jacq. O. rubella, Jacq. O. hirUlla, Jacq. O. fulgida, 

 Lindl.). Lvs. nearly sessile; Ifts. spatulate: fls. from 

 lavender or pale rosy (var. rosea) to deep rose color. 

 Cape. B.R. 13:1073. B.M. 1031. L.B.C. 3:213. 



17. versicolor (O. elongata, Jacq.). Glandular: Ivs. 

 and peduncles clustered at end of simple stems ; petioles 

 mostly elongated; Ifts. linear-wedge-shaped: fls. white, 

 yellowish below, the petals bordered with red, opening 

 only in full sunshine. Cape. B.M. 155. P. S. 8:834. 



WM. TRELEASE. 



OXER A (meaning dubious). Verbendcece. It needs 

 but a glance at any of the colored portraits of Oxera 

 coccinea to show that it is one of the most interesting 

 climbers cultivated in our 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 com- 

 pletely clothe the rafters and bloom freely, the weight 

 of the clusters causing the fls. to droop gracefully. The 

 prominent calyx reminds one of Clerodendron Thomp- 

 sons, a distinguished favorite and near relative. As 

 the cylindrical part of the corolla-tube leaves the calyx 

 it makes a sharp bend and then broadens out into a 

 funnel-shaped flower, with the 4 lobes scarcely spread- 

 ing. The spirited appearance of the fls. is enhanced by 

 the long style and the 2 stamens, which are thrust out 

 and strongly curved. 



75 



Oxrra is a genus of 10 species of shrubs, often 

 climbers, all from New Caledonia. Lvs. opposite, en- 

 tire, leathery: fls. whitish or yellowish, 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 segment. 



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 %-% in. long. Gn. 33:651; 45, p. 333. I.H. 36:76. 

 J.H. III. 30:33. B.M. 6938. G.C. III. 3:209. R.H. 1890, 

 p. 274. Once offered by John Saul, Washington, D. C. 

 Also cult, outdoors in S. Calif. 



OX-EYE. In America, Heliopsis ; in Europe, Buph- 

 thalmum. Ox-eye Daisy. Chrysanthemum Lt,ucanthe- 

 mtim and Rudbeckia hirta. 



OXLIP. Primula elatior. 



OXYANTHUS (Greek, sharp flower; referring to the 

 acute lobes of the corolla and calyx). Rubiacece. A 

 genus of 15 species of African trees and shrubs, allied 

 to the Cape Jasmine and to Gardenia citriodora. They 

 are remarkable for their extremely long and slender 

 corolla-tubes, which are topped by a 5-pointed star of 

 spreading, narrow lobes. The fls. are sometimes 5-6 in. 

 long, and 2 in. across in cultivation. Lvs. 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 exserted; 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. 

 Twelve species are described in the Flora of Tropical 

 Africa, 3 in Flora Capensis. 



Natalensis, Sond. Branches, Ivs. and calyx glabrous: 

 Ivs. elliptic-oblong or ovate-lanceolate, shortly acumi- 

 nate, 7-8 in. long, 3 in. wide : racemes axillary, loosely 

 16-20-fld. : fls. white; corolla-tube about half the length 

 of the Ivs. Wet places in woods near Durban, Natal. 

 Cult, outdoors in S. Fla. and in Eu. under glass. 



O. tubiflbrus, DC. 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. Africa. B.M. 4636. F.S. 7:737. B.M. 1992 (as 

 O. speciosus). W. M. 



OXYCOCCUS. See Vaccinium. 



OXYDENDRUM (Greek, sour tree; from the acid 

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

 caceae. SOUR- WOOD or SORREL-TREE. A genus of one 

 species, a North American tree 15-40 ft. high, bearing 

 numerous small white tubular fls. in early summer. Its 

 chief beauty lies in the character of its inflorescence 

 (see Fig. 1604), which is a panicle composed of 6 or more 

 racemes, each about 3-6 in. long and bearing as many 

 as two dozen pendent fls. It is also valued for its highly 

 colored autumn foliage. It is of rather slow growth and 

 is useful in shrubberies, along the borders of woods, or 

 even within the woodland, since it endures shade fairly 

 well. It is of easy culture in any moderately good soil, 

 but rather slow in becoming established. 



This tree is one of many known to nurserymen as 

 Andromedas. The prevailing tendencies among botan- 

 ists to-day distribute these species in many different 

 genera, leaving only A. polifolia in Andromeda as 

 strictly defined. Andromeda arborea is made a mono- 

 typic genus called Oxydendrum, based on the following 

 characters : calyx cut into 5 separate sepals which over- 

 lap more or less in the young buds : corolla ovoid-cylin- 

 drical, crowned with 5 short teeth: anthers long, linear, 

 blunt on the back, opening by long chinks down the 

 front: capsule woody; seeds numerous, needle-shaped. 



arbdreum, DC. (Andrdmeda arbbrea, Linn.) SOUR- 

 WOOD. SORREL-TREE. Fig. 1604. Smooth-barked tree 

 attaining a maximum height of 60 ft., with trunk 15 in. 

 thick: Ivs. deciduous, membranous, oblong or lanceo- 



