9 6— ROSA INVOLUTA Sm. 
Rosa involuta : caule brevi, erecto ; aculeis sparsis, gracilibus, rectis, aciculis 
copiosis intermixtis ; foliolis 5-7, ovalibus vel suborbiculatis, obtusis, parvis, plus 
minusve duplicato-serratis, viridibus, facie glabris vel leviter pubescentibus, dorso 
tomentosis, interdum glandulosis ; rhachi pubescente, aciculata ; stipulis adnatis, 
apicibus liberis ovatis; floribus solitariis, rarius paucis ; pedicellis brevibus, hispidis ; 
calycis tubo globoso, hispido vel raro nudo ; lobis subsimplicibus, lanceolatis, dorso 
glandulosis ; petalis parvis, rubellis ; stylis liberis, inclusis, villosis; fructu globoso, 
rubro, pulposo, nudo vel hispido, sepalis persistentibus coronato. 
R. involuta Smith in Eng . Bot . vol. xxix. t. 2068 (1809) ; Eng. FI. vol. ii. p. 
377 (1824). — Woods in Trans. Linn. Soc. vol. xii. p. 183 (1818). — Lindley, Ros. 
Monogr. p. 56, No. 35 (1820). — Borrer in Hooker, Brit. FI. p. 229 (1830). 
R. involuta , var. Smithii Baker in Journ. Linn. Soc. vol. xi. p. 207 (1869). 
Stem short, erect ; prickles slender, straight, i in. long, passing gradually down 
into copious aciculi and setae. Leaflets 5-7, oval or suborbicular, obtuse, small, 
somewhat doubly toothed, green, glabrous or slightly pubescent on the upper 
surface, densely pubescent beneath ; petioles pubescent, aciculate ; stipules adnate, 
with ovate free tips. Flowers solitary, rarely few in a cluster ; pedicels short, hispid. 
Calyx-tube globose, hispid or naked ; lobes simple or nearly so, lanceolate, glandular 
on the back. Petals small, pink. Styles free, included, villous. Fruit globose, 
pulpy, bright red, hispid or naked, crowned by the persistent sepals. 
Rosa involuta was discovered by Mr. J. T. Mackay, author of 
Flora Hibernica , in 1800, in the Hebrides. It was also collected 
about the same time by Dr. Walker in the same locality. Mackay 
includes it in his Flora Hibernica / and says that he had not personally 
found it in Ireland, but that according to Dr. Hincks it had been 
collected at Glengariff, Co. Cork. Rosa involuta is a collective name 
representing a series of hybrids between Rosa spinosissima L. and 
Rosa tomentosa Sm. or Rosa mollis Sm., most of its forms bearing a 
strong resemblance to one or both parents ; the spinosissima influence 
is almost always evident in the acicles on the stem, and in the number, 
shape and colour of the leaflets. 
Crepin and Deseglise designated the whole group under the 
name of Sabiniae, from its commonest but not its oldest representative, 
but afterwards they appreciated its hybrid origin. It runs into several 
varieties, of which the commonest are Rosa Sabini Woods and Rosa 
1 p . 9; (1836). 
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