150 MASSACHUSETTS HORTICULTURAL SOCIETY. 



P. Cobcen has the largest (lowers of the genus ; the}* are of purple 

 color and sometimes even three inches long. P. grandijlorus has 

 glaucous foliage and large spikes of dark purple flowers ; while P. 

 secundijlonis, of nearly the same habit, has lilac flowers, and P. 

 centranthifolius, with shiny leaves, has long spikes of bright red 

 blossoms. 



Very little known are HesjyerocJiiron Califomiciis and H. 2:)ww?*- 

 lus, both of very dwarf habit and producing great quantities of 

 large white flowers. 



Ruellia ciliosa is a good plant, with large flowers of pale blue color. 



A remarkable plant is the Lewisia redivivn, wliich has a long 

 root, fleshy leaves, and large beautiful rosy blossoms. 



The Parnassia has thick shining leaves, and whitish flowers. 



Several species of Iloustonia are very ornamental from the mul- 

 titude of their blue or white flowers. 



The Callirrhoe is a beautiful genus of trailing plants ; the best 

 species are linariloba and involucrata, both with large purple 

 flowers. 



Linncea horealis, or Twin-flower, has trailing branches, which 

 when covered with their purplish flowers present such a pleasing 

 sight that we cannot wonder at the fondness shown by the cele- 

 brated Linnteus for this little plant ; which was afterwards named 

 in his honor. 



The beautiful genus Trillium consists of several species and 

 varieties, all producing large and showy flowers in the early sea- 

 son. T. grand iJlo7'um, with erect large white flowers, is decidedly 

 the best; while T. cernuum and T. erec^?<m have the same colored, 

 but nodding flowers. T. sessile has dotted foliage and reddish 

 blossoms. T. erythrocarpum has white and purple flowers. T. 

 pusillum and T. nivale are dwarf little plants, the former with 

 rose colored flowers ; the latter with white. T. ovatum is said to 

 have white, T. stylosum rose, and T. petiolatum, purple blossoms. 



Anemone Pennsylvanica, (Enothera s2)eciosa, and ConocUnium 

 ccelestinum are all showy plants, but they are objectionable on 

 account of their running underground stems, to which I have al- 

 ready alluded ; yet where a suitable place can be had the}' should 

 be grown, because they do not require such care to bring them to 

 perfection as alpine plants do. 

 And now we come to the 



Watkii ani> Bog Plants. — This class owes its name to the 

 wet character of the positions in which the plants are found natu- 



