2 



Arg.)? of wliicli I have not seen an authenticated specimen. Burch ell's 

 6125 and 7602, as well as Gardner's 3434, belong to this species, ox this 

 group of species, as Dr. Hubex designates it. — W. Botting Hemsley. 



Tabula 2878, 



Typical S, obovatum, Klotzsch, drawn from Glaziou's n. 22118. 



Fig. 1, base of petiole and stipules attaclied to axis ; 2,baRe of blade and petiolar 

 glands ; 3, apex of leaf ; 4, part of inflorescence bearing one advanced female 

 flower with ruptured perianth and only remains of style, and a cluster of male 

 flowers ; 5, male flower-bud ; G, the same Laid open ; 7, cross iicction of ovary. 

 All eyilarged. 



Tabula 2879. 



Typical S. Ilasshrianum^ Huber, drawn from Hassler's n. 7734. 



Fig. 1, base of petiole and stipules attached to axis ; 2, base of blade of leaf and 

 petiolar glands ; 3, apex of leaf ; 4, part of margin of leaf showing serration and 

 one gland ; 5, part of inflorescence, showing one female flower and a cluster of 

 males ; 6, style-branches. All enlarged. 



Oeservatioxs on the Gexus Sapium. 



In the twenty-seventh volume of the Icones, 1901-2 (tt. 2647-2650 

 and 2677-2684), I commenced a revision of the American species of 

 Sapimn, and it was intended to proceed with it in the next volume, 

 giving figures of all the species of which authenticated specimens were 

 accessible ; but circumstances prevented this plan from being carried 

 out. Meanwhile Dr. J. Huber, of Para, Brazil, took up the genus 

 and published (Bulb Herb. Boiss. 1S06, ser. 2, vol. vi. pp. 345-364 and 

 433-452) two instalments of a " Revue critique du genre Sapium " 

 illustrated by reduced figures of detached leaves, and natural size 

 figures of the flowers, fruits and seeds, so far as he was able. This 

 review is an exceedingly valuable contribution to the subject, and I am 

 indebted to the author for the correction of some mistakes that I had 

 made. On the other hand, I do not agree with him in a few instances, 

 having, perhaps, had fuller material under observation than he had. 

 Unfortunately, Huber does not include 'all the species of the Amazon 

 region, so that I am obliged to act independently, so far as some of 

 them are concerned. 



One of the inost important points on which he does not agree with 

 nae is my identification of S. Aucvparivm, Jacq., and, after much con- 

 sideration, I think he is right ; but for further particulars on this subject 

 see the letterpress to tab. 2895. 



Iluber also correctly reduces Safinm mexicamm, Hemsl (Ic. t. 2680) 



(Ic. t, 2679) to StiUingia Salpinyadenia, Huber. 



liferwn, Hemsl. 



Although Huber has anticipated me to a great extent in the work T 

 had begun, the publication of good figures of authenticated specimens 

 of another set of species will be none the less useful. 



Beginning with Sapimn dbovaimn, Klotzsch, it was soon apparent 

 that 5. Ha^sknanum, Huber, was founded on very fine specimens of the 



