1154 ARBORETUM AND FRUTICETUM. PART III. 
* 1. A. pRocu’mBens L. The procumbent Azalea. 
Identification. Lin. Sp., 205. ; Pursh Fl. Amer. Sept., 1. p, 154. ; Don’s Mill., 3. p. 851. 
Synonymes. Chamelédon procambens Link Enum., 1. p.210.; Loiseledria procambens Deaf. 
Engravings. Fi. Dan., t.9.; Lin. Fl. Lapp., ed. 2., p. 60. t.6. f.2.; Eng. Bot., t.865.; Lodd. Bot. 
Cab., t. 762.; Bot. Misc., 2. p. 64. t.53,; and our fig. 964. 
Geography, $c. Native of Europe, on mountains; 
plentiful on the tops of mountains in Scotland, but 
rare on the mountains in the north of England. In 
North America, it is found wild in the alpine regions 
of the White Mountains, New Hampshire, and on 
Grandfather Mountain, Carolina, &c. A procumbent . 
shrub, flowering in April and May, and requiring to 
be grown in sandy peat, either in a border or in pots, 
and in an airy situation. The flowers are small, and 
rose-coloured ; and, according to Pursh, do not appear 
in Carolina till July. Thesame author says, “ This 
plant has so much affinity to Lédum duxifolium Ait. 
(Leioph¥llum ¢hymifolium Pers.), that I have scarcely 
been able to persuade myself that they are distinct 
plants. Comparing specimens of different varieties of the latter, with those 
of A. procimbens from different countries, in Mr. Lambert’s herbarium, I 
could find no other distinction between both, than that of the Lédum being 
an upright little shrub, with decandrous flowers, which are white, whereas the 
present species has procumbent stems, and pentandrous red flowers. It most 
certainly ought to be taken from this genus, or else all the rest but this one 
united with Rhododéndron.” (Pursh Fl. Amer. Sept.,i. p. 155.) This has 
been done by Mr. David Don, in his new arrangement of the order Ericacez, 
which has been adopted in G. Don’s Mill., and which we have followed. 

Genus XXIV. 
a 
LEIOPHY’LLUM Pers. Tue Letopnytium. Lin. Syst. Decandria 
Monog nia. 
Identification. Pers. Ench., 1. p. 477.; Spreng. Syst. 2. p.276.; Don’s Mill., 3. p. 851. 
Synonymes. Ammyrsine Pursh Fl. Amer. Sept., 1. p.280.; Fischera Swartz; Lédum }duxifdlium 
Berg , Ait. | 
Derivation. From leios, smooth, and phullon, aleaf; in reference to the smoothness of the leaves. 
Description. Diminutive, but erect, evergreen shrubs, natives of North 
America, on mountains. 
#« 1. L. Tuymiro‘Lium Pers. The Thyme-leaved Leiophyllum. 
Identification. Pers. Ench., 1. p. 477. ; Spreng. Syst., 2. p. 215. ; Don’s Mill., 3. p. 831. 
Synonymes. Ledum buxifdlium Bergius in Act. Petrop., 1779, p. 1. t. 3, f.2., Ker Bot. Reg., t. 531., 
Ait. Hort. Kew., 2. p.66., Lodd. Bot. Cab., t. 52.; Lédum 
thymifdlium Lam. Dict., 3. p. 459., and Iil., t. 363. f. 2.5 
Leédum serpyllifolium L’ Hérit. Stirp. Nov., 2. t.10.; Ammyr- 
sine buxifdlia Pursh Fl. Amer. Sept., 1. p. 301. ; Sand Myrtle, 
New Jersey. 
Engravings. Bergius in Act. Petrop., 1777, p.1. t.3. f. 2.5 
Bot. Reg., t. 531.; Ait. Hort. Kew., 1. p.66.; Lodd. Bot. Cab., 
t. 52.; Lam, Ill, t. 363., f.2.; L’Hérit. Stirp. Nov., 2. t. 10. ; 
and our fig. 965. 
Description, §c. A shrub, from 6in.to 1 ft. high, 
a native of New Jersey, and the mountains of 
Carolina, particularly on the highest summits of 
the Catawba ridge. It is an elegant little shrub, 
growing in its native habitats, according to Pursh, 
to the height of about 6in., and sometimes a 
foot; the delicacy of its leaves,and abundance 

