183 



Heliomeris nevadensis (Gymnolomia nevadensis Nelson, 1904). 

 Heliomeris hrevifolia (Gymnolomia brevifolia Greene, 191 3). 

 Heliomeris longijolia {Gymnolomia longijolia Rob. & Greenm,, 



1899). 

 Heliomeris annua {Gymnolomia multiflora annua Jones, 1895). 

 Heliomeris liispida {H. multiflora hispida Gray, 1853). 

 Heliomeris hispida ciliata {Gymnolomia hispida var. ciliata Rob. 



& Greenm. 1899). 

 Heliomeris porteri {Riidbeckia porter i Gray; Gymnolomia porteri 



Gray) . 

 Heliomeris obscura {Gymnolomia obscura Blake, 1916). 

 Arnica monocephala Rydb. becomes A. pedunculata Ryclb. f. 



monocephala. 

 BoLT-DER, Colorado. 



THE HAWAIIAN SUMACH 



Nexeleau; Rhus semialata var. sandwicensis Engler 



By Vaughan MacCaughey 



In 1917 the author published an annotated list of the forest 

 trees of the Hawaiian Archipelago, in the Bulletin of the Torrey 

 Botanical Club (44: 145-157). In the Botanical Gazette (64: 

 89-114, Aug. 1917) he described in detail the unparalleled en- 

 demism of the Hawaiian flora, especially the arborescent flora. 

 The present paper deals with an endemic tree, the Hawaiian 

 sumach, the sole native representative of a large and important 

 tropical family. At present there is no detailed account of this 

 tree in the literature. The Hawaiian sumach is a small tree, 



white patches on the rays is fading, but these are irregular. In the palest forms 

 of Helianthus annuus obtained by my wife in her cultures, the rays are at first 

 light yellow throughout, but at full maturity are pale yellowish basally, shading 

 into white apicallj'; but the transition is not abrupt as in the Heliomeris. 



The insect-visitors of H. muUiJlora were noted, and consisted of the following 

 bees: Bombus bifarius Cresson, Panurginus patlera Ckll., Halicloides cryx Vier.^ 

 Halicins cressoni'Roh., and the honey-bee; also the fly Erislalis lalifrons Lev., and 

 the plant-bug Ligyrocaris contractus Say. Phacelia and Mo7iarda at the same 

 place were visited by almost entirely different sexes of bees, Ijelonging to other 

 genera in the main: e.g. AnUiophora on Monarda, Osmia and Anlhidium on 

 Phacelia 



