THE BONAVIST, LABLAB, OB HYACINTH BEAN". 7 



bonavist. The pod forms depicted show much less divergence from 

 one another than in undoubted varieties of bonavist grown at Ar- 

 lington Farm. 



Prain (14) thinks that Roxburgh reversed the incidence of the 

 Linnsean names, partly because he cites plate 136 of Rumphius (16) 

 as representing Doliehos lablab, when as a matter of fact the same 

 plate is cited as D. lignosus by Linnaeus in 1763 (11, p. 1022). 



Prain further states that the two can be distinguished by the fol- 

 lowing characters : 



Doliehos labial) L. Pods longer, more tapering at point; seeds with long axis 

 parallel to sutures. 



Doliehos lignosus L. Pods shorter, more abruptly truncated at end; seeds 

 with long axis at right angles to sutures. 



On the basis of these pod characters, S. P. I. Nos. 8356, 25132, 21998, 

 and 17534 would be Doliehos lablab and 27533 and 31363 would be 

 D. lignosus (compare Plate I), but in all these varieties the long axis 

 of the seeds is at right angles to the sutures. If the description of 

 Prain (14) of the position of the seeds is correct in what is desig- 

 nated as D. lablab, then all of the plants tested in our studies are 

 D. lignosus. 



On the whole, the writers incline to the view that two species can 

 not be differentiated on the basis of the characters ascribed by Rox- 

 burgh (15) and by Prain (14). It seems doubtful, indeed, whether 

 any of the varieties discussed by these botanists represents the 

 Doliehos lignosus of Linnaeus. 



The plant cultivated as an ornamental in California under the 

 name Doliehos lignosus is in reality Doliehos jacquinii DC. 



NOTES ON THE INTRODUCTION NUMBERS OF DOLICHOS LABLAB. 



The following notes refer to the various introductions of Doliehos 

 lablab made by the Office of Foreign Seed and Plant Introduction 

 from 1899 to 1913. 



The 95 lots here enumerated represent at least 50 varieties, judg- 

 ing partly by the seeds. At Arlington Farm, Va., 57 lots represent- 

 ing 39 varieties were grown from one to four seasons, and full com- 

 parative field notes of these were secured. Twenty-five of these are 

 early enough to mature and two to blossom. Twelve are so late that 

 they had not even formed buds before they were killed by frost. 



20 3. From Paris, France, L899. Sec No. 1^)447. 



2882. From Wuchang, China, 1899. No data preserved. 



3286. From Algeria, L899. Chinese white-flowered No. I. Seeds apparently 



Identical with No. 20447. 



3287. From Algeria, 1899. Chinese white-flowered No. 2. Seeds quite the 



same as No. 3286. 



