156 AMENTACEiE. [Betula. 



an inch long, adult leaves 2-2^ inches, broadly ovato- rhomboid, rather acute than acuminate, of a harsh and 

 dry but not thick texture, slightly lobed at the margin, and inciso-serratc, the serratures coarse and sharp, 

 paler beneath, but never, cither in the old or younger state, dotted, Male catkins resembling those of the 

 preceding, 1-2 inches long, 



4. B. exceha (Ait.); «*foliis ovatis acutis serratis, strobilorum squamis lobis lateralibus 

 rotundatis, petiolis pubescentibus pedunculo brevioribus," HortKew.ed* 1. r. 3. p. 337. 

 Ph, Am, 2, p. 621.— B. lutea. Mx, N. Am, Sylv. 2. /?. 103. t 73. 



Hab, Abundant in the forests of New Brunswick and Nova Scotia, Michaux.^l have never been so 

 fortunate as to receive satisfactory specimens of this plant, either from British N. America, or from the 

 United States: from its qualities and properties, however, as related by Michaux, it would seem to be a 

 distinct species ; but the figure of this latter author, and specimens of foliage which Mr Kendal sent from 

 New Brunswick, marked " Yellow Birch," seem to differ in no respect from the following : and Bigelow 

 (FA Bost.p. 856) observes of B. exceha, "it has considerable resemblance to B. lenta, but the cuticle has 

 a yellowish colour." — It will be seen by Michaux's figure that the lateral lobes of the scales of the catkin are 

 as in the following species. p. 



5. B, lenta (L.) ; foliis ovatis seu oblongo-ovatis brevi-acuminatis basi oblique cordatis 

 obtusisve argute subduplicato-serratis nervis approximatis parallelis, subtus petiolis 

 villosulis, junioribus sericeis, amends brevi-pedunculatis foemineis fructiferis ellipticis, 

 squamis glabriusculis nervosis lobis lateralibus ovato-rotundatis patentibus intermedio 

 elongate. Ph, Am. 2. p. 621. Mx. N. Am, Sylv. 2. p. 106. t. 74. — B. carpinifolia. Ehrh. 



Hab. Abundant in Nova Scotia, New Brunswick, and in Canada, where it is known by the name of the 

 '* Cherry Birch.'* Michaux, Mr Kendal— It is a pity that Ehrhart's appropriate name of carpinifolia 

 cannot be preserved to this species. It is reckoned among the most beautiful and valuable of the genus. 

 The leaves are often, but by no means universally, furnished w ith a tuft of wool in the axils of the veins. 



6. B, pumila (L.); *'humilisj foliis orbiculari^obovatis serratis subtus (junioribus 

 praecipue) ramulisque pubescentibusj amentis foemineis cylindraceis." Willd, Sp, PL L 4, 

 jo. 467. Jacq, Hort. Find, t 122. {non Diet des Sc. Nat, cum Ic.) Ph. Am. 2, p. 622. 



Hab. Canada. {Linn.) Newfoundland. Miss Brenton, Labrador. Dr Morrison. — I have seen no 

 plant corresponding exactly with the B. pumila^ except one specimen from Newfoundland, and another, less 

 distinctly marked, from Labrador ; but these I can onl}' consider a downy state of B. glandulosa. The B. 

 pumila of Diet, des Sc. Nat. seems to be undoubtedly the European B. fruticosa. 



7. B, glaiidulosa (Mx. Am. 2. p. 18); humilisj ramis resinoso-punctatis v. laevibus 

 glabris, foliis obovatis seu subrotundo-obovatis obtuse serratis glabris, amentis foemineis 

 lato-cylindraceis breviusculis, squamis trifidis lobis oblongo-subovatis intermedio parum 

 longiore. Ph. Am. 2, p. 621. 



Hab. Canada and Hudson's Bay. Michaux. Goldie. Grand Saline and Mountains of Providence, and 

 from Lake Winipeg to Fort Franklin. Br Richardson. Drummond. Labrador and Newfoundland. Miss 

 Brenton. Br Morrison — Leaves from J to }, or rarely an inch long, varying in width, and somewhat in 

 the length of the petiole : so that some of the specimens, it must be confessed, come very near to the follow- 

 ing. I have selected the best characters I have been able for distinguishing them. 



8. B. nana (L.) ;. humilis, ramis resinoso-punctatis v. laevibus glabris, foliis suborbicu- 

 laribus grosse dentatis glabris, amentis foemineis brevibus cylindraceis, squamis profunde 





