By Mr. Theodore Hartweg. 145 



tation, furnished Aplopappus stoloniferus ; and a Commelynaceous 

 plant which constitutes a new genus (Lampra volcanica Benth. ) 

 was found unfolding pretty white flowers where the blocks of stone 

 afforded it a little protection, whilst in the more exposed places it 

 had been nipped by frost. The only tree which grows near the 

 crater and even inside of it is Pinus Hartwegii; and these speci- 

 mens are equally large with those observed in Mexico. The cones 

 which had been but sparingly produced that season were then 

 (in August) half ripe ; and the squirrels which visit that desolate 

 region had eaten them even in that state. 



During my stay in Guatemala, I saw this mountain twice covered 

 with snow, or rather with hailstones ; but the top not being within 

 the limits of perpetual snow, the latter seldom lies more than two 

 or three days. No water being found on the ascent after leaving 

 the village of Santa Maria, I had to include that article among 

 my provisions, although I was rather liberally supplied from above, 

 during the night which I passed in the crater. 



Crossing the plain of Guatemala in a southerly direction, I as- 

 cended the gentle acclivity of the Cuesta de Pinula, and arrived 

 at the farm of Arrasola, which is situated about 500 feet above 

 the plain. The undulated surface, clothed with a green sward and 

 detached shrubberies, presented a beautiful picture, and strongly 

 reminded me of park scenery in England. In the shaded woods 

 m dells, I found Odontoglossum grande, bearing from 3 to 4 large 

 showy flowers on a spike ; in the more exposed situations Orni- 

 ttocephalus inflexus, Ccelia macrostachya, with dense spike of rose- 

 coloured flowers, and Oncidium pergameneum, hicallosum, and 

 the latter with a flower-stem equalling the leaves, and large 

 yellow flowers, were collected. 



Having here received instructions from the Council of the 

 Society, to proceed to the equatorial Andes, I packed up my 

 collection ; duplicates from which I remitted from time to time. 

 The following is a list of plants collected in Guatemala, which 



