1) Under the different drying treatments, the control, and drying in the sun and in the shade for different periods, the effect of drying the leaf material of citronella on the yield and physicochemical properties of the oil was investigated in 1964 and 1966.
2) The oil content on the fresh weight basis was found not to be affected by the drying.
3) The ester value of the oil tended to rather decrease, on the other hand, the acetyl value seemed to increase, due to the drying.
4) The citronellal and total geraniol conents of the oil tended to rise somewhat on a result of the drying. This shows the quality of the oil can be improved by the drying treatment of the leaf material.

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1. This is the study of suitability of Queensland arrow-root (Canna edulis) as a feed-crop in Japan.
2. The yield of C. edulis per 10 ares is 12, 123.4kg in up-ground part (stems and leaves) and 6377.4 kg in under-ground parts (rhizomes) .
3, It is difficult to judge by the results of chemical analysis only that C. edulis is more superior than sweet-potato, Irish-potato and maize as green fodder.
4. According to the comparison of T. D. N. and D. C. P. per 10 ares C. edulis is by far superior to other feed crops mentioned above as the values of C. edulis are 1, 386.2 and 236.9 respectively and those of sweet-potato giving the largest yield in these three are 721.9 and 39.5.
5. As there are few pests and diseases of C. edulis and it seems that this crop has larger wind-resistance for typhoon, C. edulis is one of the crops very easy to culture.
6. C. edulis is grown with rhizomes and the amount of rhizomes for seeds is 130 kg per 10 ares at least. Concerning to the storage of rhizome as seeds it seems very easy to winter over when rhizomes are stored under ground lower than 30 cm even in the fields.

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[in Japanese]

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(1) Passiflora edulis (purple flower variety) has stomata on the epidermis of hypocotyl, cotyledon, leaf, stem-tendril, stem and epicarp, but there is no stoma on the upper face of leaf and on leaf-veins.
(2) The structure of stoma ofP. edulisbelongs to second-type consisting of two kidneyshape guard cells. Auxiliary cells of stoma on hypocotyl, cotyledon and lamina are same in size and shape of epidermal cells of each part, but on petiole and stem those are smaller than surrounding epidermal cells of each correspondent part, and on stem-tendril two types mentioned above exist togather. On epicarp, auxiliary cells are usually 6 and same size as small as epidermal cells of epicarp.
(3) Distribution of stomata on hypocotyl, cotyledon, lamina, stem, stem-tendril and epicarp are uniform, but on petiole it is not so, as density of distribution on apical part is larger than that of basal part and that of lower face of petiole is larger than that of upper face. On stem, one year old stem has uniform distribution of stomata but on the stems older then two years distribution of stomata is unequal as there is maldistribution of epidermis as the result of periderm formation.
(4) Stomata on lamina and epicarp are arranged at random directions, but on cotyledon, petiole, hypocotyl, stem and stem-tendril directions of arrangement are fixed, that is, on cotyledon stomata are arranged paralleling to longitudinal axis of cotyledon and on petiole, hypocotyl, stem and epicarp stomata are arranged paralleling to vascular bundle.
(5) Density of distribution of stomata gets smaller in order of lamina, lower face of cotyledon, upper face of the same, stem of one year old, hypocotyl, stem-tendril, epicarp and petiole, and numbers of stomata in 1 square millimetre corresponding to each part mentioned above are 352.2, 188.0, 55.2, 44.8, 27.2, 20.0, 15, 1 and (3-5) respectively.
(6) Periderm formation caused by growth in thickness of stem develops locally and partially and epidermis does not fall down, so even on stems older than six years epidermis exists in living and stomata also exist yet not losing function. But, as periderm-formation proceeds more and more stomata are gradually destroyed mechanically.
(7) The size of stoma varies according to the organ or part on which stomata exist. As growth in thickness of stem advances size of stoma on stem becomes larger gradually.

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