DK. X. AXDEHSOX OS IKDIAX ACAXTHACK.i;. 427 



the names Avere left, nearly all tlio species placed in those genera 

 by Linnaeus, Yahl, and other authors were removed to new 

 genera, Ruellia, as constituted hy JS'ces, is composed of species 

 which, in my opinion, must be remoA'ed to Hemlgrapliis^ a small 

 genus almost confined to the Malayan peninsula and archipelago 

 and the Philippine islands, while DijjteracantJms of !N"ee3 was 

 composed by liim of the true species of BuelUa. Justicia fares 

 even worse than RuelUa^ as the only plants retained in it by 

 I^ees are mere Tarieties of one widely diffused species, Justicia 

 Bcbolium^ Linn., which after all is not a Justicia but an JErantlic- 

 oniim, E, Echolittnij T. Anders. These genera thus restored to 

 their proper position, become the largest genera in their re- 

 spective suborders. 



The general geographical distribution of Acanfhacca? was dis- 

 cussed by rrankenheim in a paper he published in the Linna^a 

 for 1848. Nees von Esenbeck\s monograph of the order, in 

 De Candolle's Prodromus, formed the basis from which the de- 

 ductions Avere drawn. The tables Prankenheim gave for the dis- 

 ■ tnbution of tlie order in India are almost of no value, as the geo- 

 graphical divisions he adopted cannot be accepted as natural by any 

 one acquainted wdth the physical features of the Indian continent. 

 In attempting to illustrate the geographical distribution oiAcan- 

 tliacecein India I have" divided the region into nine provinces; — 1. 

 Ceylon. 2. The western peninsula, including that part of India 

 south of a line drawn from the moutli of the Goddavery to that of 

 tlie jN'erbudda. 3. Central India, comprising the country between 

 tlie northern boundary of the western peninsula and the Gangetic 

 valley ; Orissa, Berar, 3Ialwa, and the southern portion of Behar 

 and Bundelcund are comprised in this division. 4. The lower Gan- 

 getic plain, which term I apply to the flat alluvial plain through 

 ^vhieh the Gauges and its tributaries flow. This province extends to 

 the base of the Himalaya on the north, on the east to the Teesta 

 iind Brahmaputra, on the south to the sea and the northern 

 boundary of what I have regarded as Central India, on the 

 v.-est to a line passing through the longitude of Benares. 5. 

 Northern Hindostan, in which I have comprehended the upper 

 Gangetic plain, the Punjaub, and Scinde. G. The Ilnnalaya moun- 

 tains. 7. Eastern Bengal, comprehending the countries to the east 

 of the eastern boundary of the lower Gangetic plain, comprising 

 Assam, the Khasia, and the neighbouring hill ranges, Cacbar, Tip- 

 perah, and Chittagong. 8. Burmah, tlie Tenasserim provinces 

 and the Andaman Islands. 9. Malayan peninsula. The boundary 



