568 
Onoclea—continued. 
of planting them close to the edge of a pond, with the 
result that O. sensibilis (see Fig. 602) rivals in size and 
majesty the Royal Fern (Osmunda regalis) itself. 
Onocleas may be increased by means of spores, but 
their propagation is effected usnally by division of their 
underground rhizomes, or of their stolons, from October 
to March. 
Fic. 602. ONOCLEA SENSIBILIS, showing Habit and Portions of 
Fertile Frond and Barren Leafiet. 
To the species described on p. 497, Vol. II., the following 
variety should be added: 
O. germanica recurva (recurved). fronds having the edges 
of the pinne rolled or recurved, which imparts a light and 
charming appearance. 1889. This is frequently found cata- 
logued as O. pennsylvanica recurva. 
ONONIS. Syn. Anonis. O. hispanica is now regarded 
as a variety of O. Natria. O. arvensis (Rest harrow) is 
the correct name of the British O. spinosa. Of the well- 
known O. rotundifolia there is a beantiful variety in 
O. r. splendens. 
ONOPORDON. 0. 
O. illyricum. 
O. tauricum (Taurian). /.-heads, involucral scales lanceolate, 
rigid, somewhat viscous, the outer ones widely spreading. 
7. decurrent, sinuate, spiny-toothed, greenish on both sides. 
horridum is a synonym” of 
Stems erect, branched, pubescent. South Europe. Hardy 
biennial. Syn. 0. virens. 
O. virens (strong). A synonym of 0. tauricum. 
ONOSERIS. Inclading Isotypus. To the species 
deseribed on p. 498, Vol. II., the following should be 
added : 
O. purpurata (purple). 7.-heads purple; florets exceeding the 
' involucre; scape branched to the middle, three-headed. 
7. radical, densely tomentose beneath, lyrate; terminal lobe 
the largest, somewhat deltoid-hastate. Colombia. An almost 
stemless, greenhouse perennial. 
‘ONOSMA. To the species described on 
Vol. II., the following shonld be added : 
©. albo-roseum (white and pink).* fl. white, in a few days 
changing to deep rose, sub-sessile, pruinose-velvety; corolla 
nearly lin. long; raceme simple, rarely bifid. 7. hoary-grey, 
oblong, obtuse, attenuated into the petioles; cauline ones 
sessile. Asia Minor, 1890. A beautiful hardy perennial or 
under-shrub. 
O. pyramidalis (pyramidal). 7. drooping, in nodding, short 
racemes; corolla bright scarlet, fading to lilac, about as long 
as the sepals, with a rather contracted, truncate mouth. 
October. “£, radical ones numerous, rosulate, 10in. to 12in. 
long, nearly lin. broad, narrow-lanceolate, acuminate; cauline 
ones 4in. to 6in. Jong, sessile, lanceolate, acuminate. Stem 
1ift. to 2ft. high, stout, terete, pyramidally branched. Western 
Himalayas, 1886. A greenhouse or half-hardy plant, covered 
with white hairs. (B. M. 6987.) 
O. tauricum (Taurian). A form of 0. stellulatum. 
ONYCHIUM. Although four species belonging to 
this genus are known in cultivation, the two most 
extensively grown, O. auratum (see Fig. 603) and 
p. 498, 
THE DICTIONARY OF GARDENING, 
Onychium—continued. 
O. japonicum (see Fig. 604), are extremely elegant, and 
possess some useful decorative qualities. Their fronds 
are so light and finely eut, and of such a pleasing colour, 
specially 
that they are adapted for mixing with 
Fic. 603, FERTILE FROND OF ONYCHIUM AURATUM. 
* 
eut flowers, amongst which they look as graceful as 
some of: the finest Adiantums, and remain fresh much _ 
longer. While O. japonicum thrives well in a cool 
house—in fact, will not stand stove treatment, under 
Fic. 604. ONYCHIUM JAPONICUM. 
which it is soon attacked by Thrips—O. auratwm uires 
a stove, or at least a good intermediate house, the 
pen ee oe eee 
» ’ ton & ys 
