FROM THE SOCIETY'S GARDEN. 159 



or juncture of the leaf with the stem, and sessile, or without 

 stalks. The cup of the acorn is hemispherical, and furnished 

 with loose brownish scales ; the acorn, much longer than the 

 cup, is ovate and pointed. 



" We do not recollect to have seen this ti'ee properly associated 

 with any other, except occasionally the Platanus racemosa ; 

 their shade is hostile to almost every kind of undergrowth. 



" By Persoon tliis species is said to have been found on the 

 eastern coast of North America, while Pursh attributes it to 

 the north-west coast, about ISTootka Sound. It does not, how- 

 ever, extend even to the territory of Oregon, as far as my 

 observation goes." 



Nee says, " I have only seen branches collected at Monterey 

 and Nootka. The leaves of the young plants are perfectly 

 smooth when first developed, of a thin consistence, with nume- 

 rous slender sharp dentures beneath ; they are of a brownish 

 yellow colour, and appear smooth and shining." 



Tlie long narrow acorns, almost conical, are a remarkable 

 feature in the species. 



9. Thy KS ACANTHUS LILACINUS.* 



A plant of this well-marked species exists in a stove in the 

 Garden of the Society, but its origin is unknown. It approaches 

 the Justicia bracteolata of Jacquin, which is no doubt the same 

 as Thyisacanthus Lemaireanus, but differs essentially in the 

 barren stamens being subulate and not spathulate as if preparing 

 to bear a piece of an anther. 



The leaves are oblong-lanceolate, thin, downy, wrinkled, 

 tapering into a long stalk. The flowers are in contracted 

 thyrsoid panicles, with subulate abortive bracts. The calyx is 

 downy. The corolla pale lilac, funnel-shaped, inflated, with a 

 four-lobed limb, covered inside with glandular hairs. Its upper 

 lip is erect and 2-lobed ; the lower is deeply divided into 3 

 revolute segments. 



It requires the same treatment as such Acanthads as tropical 

 Justicias, Ruellias, Eranthemums, and the like. 



* T. Ulacinus ; pubescens, foliis oblongo-laiiceolatis nigosis in petiolum 

 angustatis, thyrso interrupto Dudo contracto multifloro, scpalis pubescenti- 

 bus, corollse inflatse infundihvilaris Umbo intus glanduloso labio supremo 

 emarginato erecto inferiore tripartito revoluto, stamiuibus sterilibus subu- 

 latis. — J. L. 



