BOTANICAL EXCURSION TO NORTH CAROLINA. 49 



belongs to Zigadenus. 1 The Melanthium Capense (Andro- 

 cymbium, Willd.) was added some time afterwards. 



The rocky summits of the mountains afforded us Sedum te- 

 lephoides ; Heuchera villosa ; Paronychia argyrocoma, which 

 forms dense silvery tufts on the highest and most exposed 

 peaks ; Veronica officinalis, serpyllifolia, and agrestis (all 

 certainly native) ; Lycopodium rupestre, in a very beautiful 

 state, and on the Phoenix Mountain we found a solitary speci- 

 men of L. Selago ; Arabis lyrata, with perfectly accumbent 

 cotyledons ; Potentilla tridentata, which we only saw on the 

 Bluff Mountain ; Woodsia Ilvensis ; Saxifraga leucanthemi- 

 folia, which not unfrequently attains the height of two feet, 

 with a large and slender effuse panicle ; Diervilla trijida, 

 entirely resembling the northern plant ; JPyrus melanocarpa ; 

 Sorbus Americana, (3. microcarpa ; Rhododendron Cataw- 

 biense, just out of flower, while R. maximum, extremely 

 abundant along the streams and mountain sides, was only be- 

 ginning to expand its blossoms. 2 In such situations also we 

 found a marked dwarfish variety of Hedyotis purpurea, grow- 

 ing somewhat in tufts, and scarcely exceeding four or five 

 inches in height. The flowers, which are deep pink, while in 

 the ordinary form in this region they are nearly white, pre- 

 sent the dimorphism which obtains in several sections of the 

 genus ; the stamens in some specimens being inserted in the 

 throat of the corolla and exsert, while in others they are in- 

 serted near the base of the tube and included ; in the former 

 the style is uniformly short and included, and in the latter 

 long and somewhat exserted. These two forms were often 

 seen growing side by side, and appeared to be equally fer- 

 tile. The Amianthium musccetoxicum, which is common in 

 the low country of the southern States, we here found only 



1 The Helonias glaberrima, " Botanical Magazine," t. 1680, on which Zi- 

 gadenus commutatus of Schultes is founded, is Z. glaucus ; the specimens 

 came from Eraser's nursery, hut doubtless were not derived from the 

 southern States. Helonias bracteata, " Botanical Magazine," t. 1703, is 

 Z. glaberrimus, Michx., not fully developed. 



2 These shrubs bear the name of " Laurel " ; while the Kalmia lati- 

 folia is universally called "Ivy," or "Ivy-bush." 



