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the arrangement of Niedenzu, but we cannot accept his nomen- 
clature. He calls our plant (from Guyana) A. reticulata Niedenzu, 
because retzculata is the oldest specific name. But there is 
already a H. reticulata Grisebach, in Mart. Fl. Brasil. 4a': 71, 
which is quite a different species; however, Niedenzu apparently 
disregards this and without any reason simply changes the name 
FA. reticulata Griseb. to H. Grisedachiana Niedenzu. There is 
no need to remark that such a method is contrary to the accepted 
rules of nomenclature. A. re¢¢culata Griseb. must keep its name, 
and the next available name must be used for our species. This is 
Banisteria multiflora DC., which must be transferred into the 
genus Aleteropterzs. 
The second species from the West Indies is called by Niedenzu 
fleteropterts longifolia Niedenzu, on account of Banisterza longz- 
folia Sw. (Prod. 1: 589. 1800). But there is also an older 
longifolia H.B.K. Nov. Gen. Amer. 5: 166. 1821. However, 
the case is somewhat different here, because Niedenzu considers 
. ongifolia H.B.K. as a synonym of 4. laurzfolia (L.) Juss. ; 
therefore, following the Vienna rules, he has the right to take up 
again the name longifolia for a different species. But we find the 
method very bad, the more so, because Niedenzu admits that 77. 
longifolia H.B.K. is not quite identical with 4. /aurdfol/a Juss., 
and he makes a subvariety of it. Now one may judge of the mixture 
of names if another monographer wants to restore A. /oxgtfolza 
H.B.K. as a distinct species. 
EuPHORBIACEAE 
Actinostemon Schomburgkii Hochr. comb. nov. 
Dactylostemon Schomburgkii Klotzsch, in Hook. Lond. Journ. 
Bot. 2: 45. 1843; in Wiegm. Arch. 7: 181. 1841, nomen; 
Mull.-Arg. in DC. Prod. 15’: 
eee Brit., Roraima (Schoméurg oe 1842-3, 20. 939), in Herb. 
N. Y. Bot. Ga oe 
EuPHORBIA XALAPENSIS H.B.R. Nov. Gen. 2: 61; 
Boiss. in DC. Prod. 15°: 53. Var. valida 
Hochr. var. nov. 
A typo differt habitu non tam elongato (in typo caules magis 
elongati et minus crassi) caulibus et inflorescentia vilosioribus, in- 
florescentiae ramis brevioribus (in typo rami foliis axillaribus fere 
