; ; middle lobe broadly obovate or suliren 



49. triquStrum 



Jip Idindi-H III li-lij H erru in , 

 Ivs. few, 4-G in. hmtf. trie 

 about as long :i- M;. 1 . ^., | 

 10-12 medium -: : ' 

 lower pair uni!' 

 tinged with yr> ■ n -.'i - 

 cordate-ovate, coil^iuliu 

 with purple; erest oraugi 



{Cymbtdium iriqiUtnim, Swz. 



I, Swz.). Pseudobulbs none: 



riquctrous and grooved: scape 



, |. II I lish, bearing a raceme of 



- lis broadly lanceolate, the 



I' i-u; petals ovate, white, 



III with purple; labellum 



i UK ar tlie middle, white spotted 



mn. Jamaica. B.M. 



yellow border 

 unicolored; p« 



O. Oeertiamn 

 probably base 



Rolf.-, r .iMi 



lilong, 

 ..mpli- 



I undulate. 

 5 probably 



spotted 



ii,i,indl. 

 upfstrf. 

 l.rillinnt 

 l.k-.-O. 



yellow, spotted with t.t' -. 

 larger, clawed, obovate-si'. ' 

 serrate lateral lobes; nii-i'; 

 Brazil. I.H. 21:165. N. m ' 

 Reichb. f. Trop. Annr - " > 

 rampant species, with yellow tl^ 

 1 in. in dium. Nov. Cent. Aui. 

 ligerum, Keiehb. f. Sepals and pf 

 yelloOTsh. with many brown dots ; 



Sb^r'v ''.""''■"'' I"!'.':,'"';', V' 



O. IV.I: . . ■ !■ , 



Ivs. in-.. 



ONCOBA (Arabian, nnkob ; name of a North African 

 spiricsl. liixAcerr. Shnib.s or small trees of tropical 

 and subtropical Africa, sometimes spiny. Lvs. alternate, 

 without stipules : fls. tomiinnl. sniifary, white, large 

 for this order, bisexual : s.j.als .mil petals .I; stamens 

 very numerous, inserte.l. in numv n.w s on a fleshy wing 

 beneath the ovarv; fil:uiiiiit~ lihfi.nu; anthers linear, 

 2-celIed, attached to the b:i~e. tri ct, uinuing at the sides; 

 stigma dilated, notched: ovary free, 1-celied; style cylin- 

 drical: berry leathery, pulpy within; seeds numerous, 

 by the natives. 



Eraussiana, Planch. 



tborus, the older brauc 



bark: lvs. ellipiie-niil'inj . iH.ine "i- -ulMiirr, , mii-, . 2 

 in. long, with mull ^ : i n i <.i,i.- 



what pale on uu< 1 1 1 i .-ile 



the lvs., 2-3 in. l-n- : " u,-, m-i.- umh au 



I'i'ii- ' '! ■ .1^ J. with narrow claws, 



I .1- ,1 .« ith scattered, -woolly 



li i , I i-il-rayed: ovaryhalry. 



I'l ill I ill i ^. I I i , 1 . Ill I - makes a very fine pot- 



|.l ml ill I . I ' . iili-ii . ieTiii>erature, flowering in spring. 

 Ii i~ :iNi' li- Till iiir - iililropical bedding. Prop, from 



ii|'. w 1 milium-, al--. from seeds. Give the plant a 



Miiiiiy liiisiiiiiii, and iilciity of Water while new growth 

 IS making. yj p, CotiLSTON and H. A. Siebrecht. 



ONCOSPfiKMA (Greek, hiiiior-sl,„pe,l see,!). Pal- 

 iiu'icew. Stoloniferous palms, with low, very s]iiiiy 

 trunks: lvs. equally pinnate; Ifts. ensiform-ai-uminate, 

 entire, equidi.stant or somewhat clustered, the veins 

 scaly beneath; rachis convex on the back, with a blunt 

 keel above: fr. small. Oncospenua differs from Eu- 

 terpe in the small, acute sepals: stamens 0-12, the an- 

 thers erect; albumen ruminate. Species G. Trop. Asia. 



fascicuUtum, Thwaites. Caudex at length 30^0 ft. 

 Iii^li. ."i-C) in. in diam. : lvs. 18 ft. long; pinnae fascicled, 

 12-18 in. long, 1-2 in. wide, lanceolate, long-acuminate, 

 the tips drooping; sheath 2% ft., armed and scurfy: fr. 

 globose, black -purple, % in. in diam. Ceylon. 



Jared G. Smith. 



ONION. Plate XXII. All the Onions of common or 

 ceiieial eiiltivation are forms of one variable species, 

 AlliiiiH ('.jHi. This plant is probably native to south - 

 western A.~ia. but it has been domesticated so long and 

 has varied su much that its aboriginal form is not 

 well understood. It was grown hy the ancient Egyp- 

 tians. It is grown primarily for its bulbs, but the 

 leaves are sometimes used as seasoning and in stews 

 Under loug-e<intinued cultivation and selection, the 

 bulbs havi- ilevel.,|.e(l iuto large and shapely organs. 

 Now anil tlien iln linll. does not develop and the neck 

 (or stalk just almM th.- bulb) remains relatively thick: 

 such oniiins are •■scniliiuis." Seeds from poorly selected 

 or deteriorated stock may be the cause of scullions: 

 they are to be considered as reverted or run-down 

 forms. Sometimes scullions result from very wet soil, 

 whereby the plants grow too much to top. Seeds grown 

 in the South or in a |n,iL---se;isf,n climate tend to pro- 

 duce plants in sIm-h , a-mi n ■_'i.jiis that do not "bot- 



The Onion is ..la i .^i of vegetable garden 



plants. In the s. .1111 .1 II III i it is grown largely as a 

 winter crop. In the m.rtli. i n -lat.s ami Canada the 

 seeds are sown or the l.nlli- ].lai,t..] :i~ s..(.n as the 

 ground can be fitted in th.- -I imi-'. li i - always best, if 

 possible, to prepare the gniiial n- ila tall in ..lal.r that 

 the seeds maybe sown ..n -' ' i a: i ^ .1' warm 

 weather. When Onions m- ' it is 



essential that the ground 1 - . , i i 11 -ur- 



face stones and litter rem.. \ 1 i Hand 



do not germinate quickly. Ii . intaee 



feeders. If the seed i.s s :. . i mi . i .n.i is 



droughty, the plants will i i i m i L. mi 



headwav. Land which is t- . a . . , i , i imt l.e 



planted' to Onions, for tlie ^.nna n |.l .1.1 .anm.t 



|.|| laii.i -iii-li competitien. In IIh- nl, I - fashioned 

 ml a- the custom to plant Onions in short 

 I . V 1. of raised beds, as in Fig. li)28. This 

 ai 111. .1 an .ii.lless amount of small hand labor and 

 usually resulted in the expenditure of more time and 

 effort than the Onions were worth. The better method 

 is to grow the plants in long rows which are far enough 

 apart to admit of the use of a wheel hoe. Fig. 1.129. 

 Even when a small quantity of Onions is desired, it 

 is better to place them all in one yn\- than t.. have 

 many short rows. With the best i.f lan.l ami manage- 

 ment, and with the use of wheel 1 -. ne.r. ..r less 



finger work will be necessary in or.l.r t.. l.rinL- tin- crop 

 to full perfection. The seed may be sown thick in the 

 home garden, and as the young plants begin to crowd, they 

 should be thinned. The plants taken out in the second 



