2420 OXYDENDRl'M 



l-sido,l raotws; calyx aivi.ic.l noarly to the b,isc 

 i,?U 5 sepals valvato in bud; corolla oyhn.ne-ovoul 

 borvlok with 5 ininvte lobes; stamens 0; ant ,. rs 

 CH^blong, oiKMUivs fron, the apex to he mul, 1, 

 stvie slichtlv exserted: caps. ovoid-p\iamidal .)-\.a\Lcl, 

 loc heidal V dehiscent, n.any-seedcd ; seeds slender.the 

 ^.tlmlate loose seed-coat prodncc^d at the ends mto 

 slender noints.— tine species m K. N. Amer. 

 ' A hamsmnc n>edunn-s.zed tree with slender spread- 

 in.' branches, rather larpe, general y o .lonj; br ght 

 J^n caves turning scarlet in fall and with small win e 

 §^crs, followed by small grayish capsules nearly as 

 ^LpU-'uous as the flowers. It is hardy North and o 

 easy culture in any moderately good soil, but ra her 

 slow in becoming established and of rather slow 

 erowth It is useful in shrubberies, along the borders 

 of woods, or even within the woodland, since it endures 

 shade fairly well. Propagation is by seeds treated like 

 those of Andromeda. 



arboreum, DC. (Andrdmcda arbdrea, Linn.). Fig. 

 o6<f' Tree with deeply fissured bark, ooca.sional y to 

 iio'ft high: branchlets glabrous: Ivs. slender-stalked, 

 oblong-lanceolate, acuminate, broadly narrowed at the 

 base, serrulate, glabrous except a few hairs on the mid- 

 rib 4-7 in. loAg: panicle 6-10 in. long; fls. ^m. long. 



2692. Oiydendroum arboreum. Sour-wood or 

 sorrel-tree. (,X'A) 



caps. 1^-Hin- long. June-Aug.; fr. in Sept., Oct Pa. 

 to Ind. and along the mountains to Fla and ba. 

 SS .5:235. B.M. 905. L.B.C. 1.3:1210. &. 27:415. 

 F.E. 24:131. M.D.G. 1904:253. Alfred Rehder.j 



OXYLOBIUM (Greek, sharp pod). Including 

 Callhtachys. Lc.guminbsx. One of many genera ot 

 Australian shnibs with pea-like flowers which are httle 

 known in cultivation. , ^ n i 



Undershrubs or shrubs: Ivs. very short-stalked, 

 opposite or more or less whorled, rarely scattered or 

 alternate: fls. in terminal or axillary racemes; petals 

 clawed; stamens free; ovary villous, se.ssile or stalked, 

 4-30^i\'uled. Nearest to Chorizema, but the keel is 

 about as long as the wings, while in Chorizema the kee 

 is much shorter. The following species was considered 

 the type of another genus; it is distinguished from all 

 other srxjcies of Oxylobium by the incomplete dehiscence 

 of the iK)d.— Species nearly 30, of which jierhaps a do/.en 

 have b<;en cult, in Europe. Their fls. are yellow, or more 

 or less flushed with red on the keel or the base of the 

 .standard. O. CalliHUichjH is perhaps the best for con- 

 servatories. In America it is cult, only in S. Calif. 



OXYTKOPIS 



Callistachys, Bcnth. Tall shrub: Ivs. mostly in irregu- 

 lar « horls of ;5, varying from ovate-oblong and 1 '. 2-2 in. 

 long to lanceolate and 4-5 in. long, leathery, silky- 

 pubescent beneath when young; racemes oblong 

 or pyramidal, 2-6 in. long. B.R. 216 (^ Calhslachys 

 lanceolata). B.M. 1925 (as C. ovala). P.M. 8:31 (as 

 C.longifolia). L.B.C. 20:1983 (as C. retoo). J.H. III. 

 35:35.. WiLHELM Miller. 



OXYPETALUM (Greek, sharp petal). Incl. Tweediea. 

 Asdcpiadacai'. S. American and largely Brazilian 

 herbs or subshrubs, twining or not: Ivs. opposite: calyx 

 5-parted; corolla deeply 5-cut short-tubed; scales o 

 the corona 5, fastened at the base of the corolla and 

 staminal tube.-Species about 100, not widely known 

 in cult. , , , 



cserfileum, Decne. Herbaceous, but more or less 

 woody below, downy: Ivs. short-petioled, oWong but 

 cordate-hastate at the base: peduncles axillary from 

 one of each pair of the upper Ivs., 3^-fld.: corolla- 

 lobes spreading: scales of the corona 5, erect, darker 

 blue, fleshy, exserted, recurved and notched at the 

 anex B M. 3630 (as Tweediea versicolor).^. C3;ru- 

 leum is a tender twining plant from Argentina wath 

 changeable 5-lobed fls. about an inch across. The tts^ 

 are said to be pale blue when they first open then 

 purpfeh, and when withered lilac. Not cult, m Amer., 

 but apparently desirable for cult. here. 



solanoides, Hook. & Arn. (Tweediea jlorihunda, Hort ). 

 Erect, little branched, shrubby or somewhat so, b it.. 

 Ivs. lanceolate to oblong-cordate acute, tomentose the 

 sinus at the base deep: fls. not so large as m 0, cB^ruleum 

 bluish tinged rose (or dull purplish red)^ >;^f ™iJ^l 

 or axillary few-fld. cymes; stammal crown of 5 fleshy 

 parts. BrazU. B.M. 4367. L. H. B.f 



OX^POLIS (derivation not explained). Umbelliferx. 

 A few erect glabrous wet-ground perennials in N . Amer., 

 seldom used in bog- and swamp-gardemng; formerly 

 known as Tiedemfnnia. The plants have tuberous 



clustered roots: Ivs. P"P;^tf °St<^™*!'\ 'flTtflu 

 reduced to hollow and jointed phyllodia^ fls. small, 

 white, in compound mostly mvolucrate and mvolucel- 

 late umbels: fr. glabrous, ovate "^.^bovate dorsally 

 flattened, ribbed or winged. O.ngidius, Raf. {liede- 

 mdnnia kqida, Coult, & Rose), Cowbane, is a poison- 

 ous herb, 2-6 ft. tall, growing m swamps, N. \. to 

 Minn and Fla., which was once offered in the trade. 

 Ivs. pinnate; Ifts. oblong to ovate-lanceolat^ or nearly 

 lineir, entir^ or sparsely dentate. Probably not now 

 Usted. 



OXYTENANTHfeRA: Bamboo. 



OXiTROPIS (Greek, sharp Uel). Legumindsx. 

 Perennial herbs, half-shrubs and shrubs. . , , , 



The genus is like Astragalus, but is distinguished by a 

 subulat'e beak at the tip of the keel ^^he American 

 species are tufted with numerous short st^,f'™n a h;^^d 

 and thick rootstock: Ivs. odd-pmnate w-ith 7-lb pairs 

 of Ifts , which are wooUy and white beiieath : calyx 

 tubular or tubular-campanulate : fls. pea-shaped (papil- 

 ionaceous) with an erect standard, wings elongated, 

 keetocc^ionally with thorn-like apex, lo^- -f ,-tcr 

 than the wings, in racemes, spikes or hea-ds and lange 

 rom yellow, Ihite through blue and purple to crimson 

 poT many-seeded.-About 234 species wi h the center 

 & he" distribution in Asia from Siberia to the Caucasus 

 Mts. and Turkestan. A few species re^ach tbe moun 

 tains of Cent. Eu. None occurs in Afr. About 18 



pe"es found in the Rocky Mts. are referred to Araga^ 

 his, a generic name brought into prominency by E^K 

 Greene (Pittonia 3:208) and reviewed m Erythea 

 7-57-64 (1899) without defimtion. 0. Lamherlii i>, 

 poE^n'ous to stick. It is one of the most characteristic 

 loco-weeds of the W. (.see Poisonous P/a"(.s). Locoed 



