Kurzii of E. gracile, and in group V. in E. Edwardii. A reduction of the female petals till they are only as wide as the hairs which spring from the base and form with them a tuft or brush, occurs in group I. in E. Thwaitesii, and in group VI. in E sexangulare (see fig. 7). From the former species arose E. achiton with no petals at all. The submerged habit is correlated with filiform leaves in group I. in E. gregatum and E. barba-caprae, and in group VIII in a series beginning with E. breoiscapon and ending with E. fluvatile; while in group II it is accompanied by a great lengthening of the stem.
This work was only rendered possible by the kindness of the officers in charge of the herbaria in the Eoyal Botanic Gardens, Calcutta (which has most of the types); the Agricultural College, Coimbatore; the College of Science, Poona ; the Forest College, Dehra Dunn; and the Eoyal Botanic Gardens, Peradiniya, in placing their material at my disposal for examination, and to them my thanks are due and warmly tendered ; but particularly to Lt.-Col. A. T. Gage, the Director of the Botanical Survey of India, and Superintendent of the Royal Botanic Gardens, Calcutta whose collection is the largest and contains most 'types'.
Explanation of the Figures
Fig. 1. Male flower of E. quinquangularc L. Fig. 2. Female flower of E. do. do. Fig. 3. Do. do. E. trilobum Ham. Fig. 4. Male do. E. caitlescens Steud. Fig. 5. Female do. E. Eleanor a sp. nov. Fig. 6. Do. do. E. minutum Hook Fig. 7. Do. do. E. Thomasi sp. nov. Fig. 8. Do. do. E. alpestre Hook. f. Fig. 9. Male do. E. horsley-Jcimda sp. nov. Fig. 10. Do. do. E. Sieboldianum Sieb et Zucc Fig. 1L. Female do. E. do. do. Fig. 12. Head of ... E. Diana sp. nov. Fig. 13. Do. ... E. roseum sp. nov.
