6 Contributions to Indian Botany : [Jan. 



engrossing interest, as the success or failure of vast speculations may- 

 depend on his acquaintance with, or ignorance of, the external agents 

 which act on the objects of his culture — whether for their benefit or 

 their injury. 



Should any one doubt the correctness of this statement, I would 

 refer him to the too short, but luminous paper of Mr. Piddington* 

 on the analysis of soils suitable for cotton, tobacco, &c. where he will 

 find most ample and irrefragable proofs of their truth— a paper, that, in 

 my opinion, cannot be too extensively made known, and one, my igno- 

 rance of which, when I wrote my desultory remarks on the culture of 

 cotton, published in No. 12 of the Madras Journal, I now greatly regret. 

 Ttee study of plants, in relation to the agents that either promote or im- 

 pede the attainment of their greatest perfection, is necessarily a difficult 

 and tedious one, from the diversified attainments which the enquirer 

 must bring to his aid, and from the prolonged meteorological investi- 

 gations which are indispensable to its completion ; but it is one, which, 

 there is every reason to believe, will much more than repay the cost. 



SYNOPTICAL ARRANGEMENT OF SPECIES. 



§ 1 Leaves alternate, pedicels solitary or aggregate, one flowered. 



1. Impatiens albida. 



2. „ dasysperma. 



3. „ floribunda. 



§ 2. Leaves alternate, peduncles two flowered, upper sepals herbaceous 

 ( green ). 



4. Impatiens auriculata. 



5. „ viridiflora. 



§ 3. Leaves alternate, peduncles several flowered, upper sepals peta~ 

 loid. 



6. Impatiens umbellatta. 



7. grandis. 



8. „ cordata. 



9. „ uncinaia. 



10. „ compa?iulata. 



11. „ viscida. 



§ 4. Leaves alternate, flowers racemose. 



12. Impatiens maculata. 



§ 5. Leaves radical, scape racemose. 



13. Impatiens modest a. 



14. „ rivalis. 



§ 8. Leaves opposite, pedicels one flowered. 



15. Impatiens fasciculata. 



16. „ rosmarinifolia. 



§ 7- Leaves opposite or verticelled, pedicels several flowered. 



17. Impatiens verticellata. 



* Reprinted in the last No. of this JoTirnah— En. 



