37— ROSA COLLETTII Crep. 
Rosa Collettii : ramis elongatis, sarmentosis ; aculeis sparsis, conformibus, 
parvis, falcatis ; foliolis 5-7, oblongis, acutis, rigidis, inconspicue simpliciter serratis ; 
rhachi glabra vel pubescente, hand glandulosa ; stipulis liberis, linearibus, deciduis ; 
floribus paucis, umbellatis vel corymbosis ; pedicellis nudis ; calycis tubo minimo, 
globoso, nudo ; lobis oblongis, acuminatis, simplicibus vel parce pinnatifidis, dorso 
pubescentibus ; petalis parvis, albis ; stylis liberis, villosis ; fructu globoso, rubro, 
parvo, nudo ; sepalis deciduis. 
R. Collettii Crepin in Bull. Soc. Bot. Belg . vol. xxviii. pt. 2, p. 49 (1889). — 
Collett & Hemsley in Journ. Linn. Soc. vol. xxviii. p. 56, t. 10 (1890). 
Stems long, sarmentose; prickles scattered, uniform, hooked, small. Leaflets 
5-7, oblong, acute, rigid, inconspicuously simply serrated, the end one 1-1J in. long, 
glabrous on both surfaces or slightly pubescent beneath ; petioles glabrous or 
pubescent, not glandular ; stipules linear, free, deciduous. Flowers few, umbellate 
or corymbose ; pedicels not aciculate. Calyx-tube very small, globose, naked ; lobes 
oblong-cuspidate, \ in. long, simple or slightly compound. Petals white, i in. long. 
Styles free, villous. Fruit globose, very small, bright red, naked ; sepals deciduous. 
Rosa Collettii was found by the late General Sir Henry Collett 
in 1888, in the Koni district of the Shan Hills of Upper Burma, at an 
elevation of 3,000-4,000 feet above sea-level, where in certain localities 
it is common on the banks of streams. In May it had nearly passed 
out of flower. It was first described by Crepin, who classed it under 
the section Systylae and placed it next to Rosa microcarpa Lindl., 
with which he considered it had many points of resemblance, adding, 
however, that the specimens had suffered so much during their journey 
from the Calcutta Botanic Garden that he was unable to form a definite 
opinion upon the inflorescence, and pointing out that in Rosa micro- 
carpa and in Rosa Collettii the columnar styles were much shorter than 
in other Systylae. Crepin named the Rose in compliment to its dis- 
coverer, who was much interested in the flora of U pper Burma, which 
was at that time but little known. It is due to his researches that two 
most distinct and interesting Roses, Rosa gigantea Collett ex Crep. 
and Rosa Collettii Crep., have been brought to our knowledge. 
As Rosa Collettii has not yet been cultivated in England, we 
are dependent upon herbarium specimens for our knowledge of its 
characters. 
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