ON PITCHER AND INSECTIVOROUS PLANTS. 



631 



the offspring. Other hybrids from the same species which are 

 among the most desirable in cultivation are .S 1 . Courtii and 

 S. M 7 rigleyana. S. chelsoni has large dark purple pitchers. 

 S. exoniensis and S. Stevensii are two of the largest and best of 

 their section. 6". melanorhoda (shown on the left of Fig. 407) 

 has deep green pitchers with dark purple veinings. .SI Willisii 

 has similar characteristics, but different-shaped pitchers. There 

 are many other hybrids worthy of note, but the above-mentioned 

 are the most desirable. 



Darlingtonia cali- 

 fornica (Fig. 408) is 

 closely allied to the 

 Sarracenias, and re- 

 quires similar treatment 

 as regards potting com- 

 post. It is hardier than 

 many of the Sarracenias, 

 and may easily be culti- 

 vated in the rockery 

 with the protection of 

 a light in winter, or in 

 cold frames. Some of 

 the finest specimens I 

 have ever seen were 

 grown under the latter 

 conditions, and were 

 in every way far 

 , superior to anything 

 I have seen under 

 greenhouse cultivation. 

 I would therefore advise 

 frame culture, especially 

 in the summer. The 

 plant requires a liberal 

 supply of moisture and 

 a fairly humid atmo- 

 sphere during the grow- 

 ing season. It should 

 be freely syringed overhead in bright weather or when the outside 

 conditions permit, especially when planted in the rockery. 



Heliamphora nutans is a rare and quaint species from 

 South America, closely allied to, and requiring similar treat- 

 ment to that recommended for the Sarracenias, with the 

 exception that it needs more heat and is best suited when 

 grown in the cool stove or warm greenhouse. It requires 

 a liberal supply of moisture and a humid atmosphere at all 

 times. 



Fig. 407. — (i) Sarracenia melanorhoda, 



(2) S. FORMOSA. 



