_Gossypium Hirsutum_.--This variety is so called because of the hairy nature of every part of the plant, leaves, stems, branches, pods and seeds--all having short hairs upon them. By Dr. Royle it is considered a sub-variety of the Barbadense cotton, and by other American experts it is given as synonymous with G. Herbaceum. However this may be, the plant has certain well-defined characteristics which possibly entitle it to be considered as a distinct type. It has been asserted by a competent authority that the original habitat of this particular cotton was Mexico, and that from this country cultivators have imported it throughout the sub-tropical districts of the world. It is also stated that longstapled Georgian Uplands cotton belongs to the Hirsutum variety. In fact most of the types cultivated in America fall into this class. Parlatore also considers it to be indigenous to Mexico, and states that all green seeded cotton which is so extensively cultivated has been obtained from this type originally. M. Deschamps, in describing the Hirsutum species, says it is divided into two varieties, one having green seeds, being of a hardier type, and the other having greyish seeds, being more delicate and growing in the more southern districts of the States. _Gossypium Arboreum_.--This plant attains treelike proportions, hence the name Arboreum. In some cases it will grow as high as twenty feet. It is also known by the name G. Religiosum, because the cotton spun from this plant was used only for making threads which were woven into cloth for making turbans for the priests of India. Dr. Royle on one occasion while in that country was informed by the head gardener of a Botanical Garden at Saharunpore that this cotton was not used for making cloth for the lower garments at all, its use being restricted to turbans for their heads, as it was sacred to the gods. That is why it also received the name, "_Deo Cotton_." One or two interesting features of this type may be pointed out. The colour of the flowers is characteristic, being brownish and purply-red and having a dark spot purple in colour near the base of the corolla, this latter being bell-shaped. Like the herbaceous type two kinds of fibre are found on the seed and great care is needed in the separation of them. Also, it should be pointed out that the fibres, in this class are with difficulty removed from the seed, clinging very tenaciously to it. The Arboreum type is indigenous to India and along the sea board washed by the Indian Ocean. The fibre from this species is much shorter in average length than any of the preceding varieties.