HARDWICKE'S SCIENCE-GOSSIP. 



109 



larger than subcristate, it resembles urbica in habit 

 and appearance, only the L. are glaucous and small. 

 Rare. 



25. R. coriifolia (Fries). A tall, branching shrub, 

 with large white firs, in dense clusters. L. greyish- 

 green, very hairy beneath, small ovate-oblong, and 

 rounded at base. Bracts large, lanceolate, hiding the 

 short ped. Fruit large, globular, ripens in October. 

 In hilly districts frequent. 



26. R. Wat son i (Baker). Very like the last, except 

 that the bracts are minute, and flrs. in small clusters. 

 Rare. 



27. R. celerata (Baker). Habit of tomentella. L. 

 grey-green. Frt. globular, on long peds., but seps. as 

 in this section. Rare. 



Group III. — Siibrubiginosce. 



L. very large, on barren shoots, densely glandular 

 on midrib ; petiole aciculate and prickly. Seps. 



Fig. 64. — Group III. (Sttbrubiginosa) of Dog-roses. 



very large, also glandular, especially on margin. 

 Ped. short, aciculate, also glandular. Bracts minute. 

 Seps. spreading, i.e. not refiexed as in Group I. 

 Frt. small, globose. 



28. R. Borreri (Woods). Prickles robust, and 

 curved at tip. L. flat (like Group I.) thin in texture 

 and shining. Peds. briskly weak. Firs, in dense 

 clusters. Styles, hairy seps. in many fine divisions. 



29. R. Bakeri (Deseg.). Prickles slender. L. 

 shining green, on upper side. Firs, in small clusters 

 (3-4). Peds. very short, seps. before the fruit is ripe 

 become ascending, but do not fall until the tips are 

 ripe, which are oblong and small. We have not 

 seen a living specimen of this species. It is said to 

 be confined to Yorkshire. 



I 30. R. marginata (Wall.). Branches glaucous. L. 



large glaucous, and hairy beneath, oblong. Frt. 

 ripens in September. Prickles strong hooked. Firs, in 

 small clusters, pale pink. A fine arching shrub, known 

 by purple and glaucous stems, and veins densely 

 glandular beneath. Not unfrequent in hilly situations. 



How to gather and study the Roses. 



It is a good plan to carry a strong jack-knife, which 

 may be obtained from any ironmonger. Armed with 

 this useful tool, and with a good large basket with a 

 cover, for it is useless to take the ordinary vasculum 

 in collecting either roses or brambles, then you are 

 equipped for a day's stroll. 



On the same shrub may generally be obtained 

 both flowers and green fruit ; tie all the specimens in 

 a bundle from each bush to avoid confusion. In 

 laying out these in the press, mark them at the same 

 time with locality, so as to remember the finishing 

 work in the autumn, for if you secure mature fruit 

 the species may be decided with ease. Dry with the 

 barren shoot several leaves with stem not less than 

 four inches long, or, as " a nod is as good as a wink to 

 a blind horse," never allow a poor or impei'fect speci- 

 men to enter your herbarium ; you will not regret the 

 trouble afterwards. Let the barren shoot be so laid 

 out on the sheet when in the press as to show the 

 upper and under surface of each leaf, upon this rest 

 many of the specific characters ; the old stem with 

 prickles should be pared on the under side to lie 

 flat on herbarium shelves. Lay out the flowers 

 with great care ; allow one at least to lie fully open 

 to exhibit the styles ; we use a bit of thin cardboard 

 when laying it out to keep it flat ; then dry it quickly. 

 To retain the delicate pinky tinge, use for this purpose 

 chalk paper (buff colours are the best) ; never gather 

 any specimens for drying in damp weather. We have 

 heard many complaints about not being able to dry, 

 or preserve the ripe fruit : nothing is easier, if no 

 pressure be employed. The cover of the press is 

 sufficient, without any extraneous weight : we admit 

 its impossibility if the full weight be used. A perfect 

 collection of British roses, with each of Baker's 

 species represented by some half-dozen examples of 

 excellently and neatly preserved specimens would 

 be invaluable, but it is a caricature to call the small 

 mutilated bits of leaves and flowers specimens. The 

 first point to attend to, and this ought to be remem- 

 bered in the field, is the sepals. If they are refiexed, 

 after the fall of the petals, as in the above cut, they 

 belong to the first group ; then from the size and 

 appearance of the leaves and bracts and glandular 

 petioles with small prickles intermingled, the name 

 of any variety may be at once ascertained. 



Damp Stains in Paper. — I should be obliged if 

 any one can tell me of any plan for removing the 

 brown spots, resembling iron moulds, which so 

 frequently appear in, and disfigure the plate paper, 

 used more especially for steel engravings. — Joseph. 

 Anderson, jun. 



