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THE JOURNAL OF BOTANY 



acutidens and about like that of A. alpestris Schmidt, with which 

 acuminatidens has a certain superficial resemblance. The very 

 rounded or suborbicular leaves seem to me to meet more rarely, 

 and the lobes to be less deep than in acutidens." 



I do not think the characters regarding the length of style or 

 pedicel can carry much weight, as undoubted A. acutidens has the 

 former shorter, as long as, or longer than, the filaments, whilst 

 the pedicels vary greatly in length on the same example. 



I have not been able to see a type specimen of A. acuminatidens, 

 but the example representing this species in Dorfler's Herb. Norm, 

 4660 — "/. vegeta, 7ombrosa: revidit E. Buser " (where it is called 

 a subspecies of aciitidens) seems to me hardly separable from 

 A. alpcstris, of which it has the more coarse unequal toothing, 

 more robust growth, less hairiness, &c. 



It may be convenient to point out, in tabular form, what seem 

 the chief distinctions of A. alpestris, A. acutidens, and its var. 

 alpestriformis : — 



A. alpestris. 

 Sterns erect, glabrous, 

 except for lowest inter- 

 node (rarely to second) 

 which has + appressed 

 hairs in small quantity. 



Leaves with 7-9 ob- 

 tusely triangular or 

 rounded lobes, which 

 are toothed all round ; 

 teeth 6-9 on each side, 

 + obtuse, broader than 

 long, apical tooth small- 

 er (rarely same size) 

 and teeth + irregular 

 in size on same lobe. 



Leaves practically 

 glabrous above ; also 

 below except for veins 

 which (though some- 

 times practically gla- 

 brous also) usually have 

 + appressed hairs from 

 apex to scarcely halfway 

 to petiole, never to base. 



Petioles usually prac- 

 tically glabrous, some- 

 times laxly -appressed 

 hairs are present. 



A. acutidens. 

 Stems decumbent, 

 densely hairy at base, 

 diminishing upwards, 

 usually glabrous above 

 third internode, hairs 

 ± appressed. 



Leaves with about 9 

 obtuse, rounded or even 

 acute lobes, which are 

 either toothed all round 

 or entire at sinus for 

 short distance (see fig. 

 1) ; teeth 7-9 on each 

 side, acute, longer than 

 broad, apical tooth uni- 

 form in size (rarely 

 smaller), and teeth + 

 regular in size on same 

 lobe. 



Leaves practically 

 glabrous above ; also 

 below except for lobes 

 next petiole which have 

 + plentiful appressed 

 hairs and veins with + 

 abundant appressed 

 hairs along whole 

 length. 



Petioles distinctly 

 (usually densely) hairy 

 with laxly -appressed 

 hairs. 



Leaves practically 

 glabrous above ; also 

 below, where (rai-ely) 

 there are sparing ap- 

 pressed hairs on lobes 

 next petiole, and veins 

 i sparingly hairy with 

 appressed hairs from 

 apex to halfway to pe- 

 tiole (rarely further). 



Petioles not so hairy 

 as type (rarely almost 

 glabrous), hairs ap- 

 pressed or slightly 

 spreading. 



Besides these differences, the shape of the flower seems also a 



var. aljiestriformis. 

 Stems decumbent, 

 less hairy than type, 

 often glabrous above 

 second internode (rarely 

 glabrous above lowest 

 internode), hairs + 

 appressed. 



Leaves of same shape 

 and toothing as in type. 



