Caryophyllaceæ. 297 



pollen has begun to develop within them. Several variations 

 may be found in the same tuft. The styles project beyond 

 the corolla. 



Intermediate forms are often found in which a few 

 or several stamens are aborted, and the others are normal 

 (Fig. F). 



There does not seem to be much difference between 

 the stigmatic papillæ of ^ and $ (Fig. 29, D and G). 



Norway (Altenfjord). Gynodioecism, ^ > $. Protandry. 

 §: petals about 5 mm; corolla when approaching 3rd stage 

 9 — 10 mm in diameter. 



A particularly large form is shown in Fig. 29, A. 



8. SteUaria media (L.) Vill. 



I have occupied myself very little with this species as 

 I expect it to be fully treated by another writer. The fol- 

 lowing is for the most part taken from the literature on 

 the subject. 



The flowers open and close according to the weather; 

 Vaucher states that the flower lasts for one day only. 

 Gynodioecism, Gynomonoecism. ^: Protandrous in various 

 degrees, self-pollination found especially in plants which 

 flower during winter. As is well-known it flowers all the 

 year round, even during the whole of autumn and winter, 

 and sets fruit continually, probably in the closed flowers, 

 thus forming a transition to cleistogamy (as regards S. Bo- 

 raeana Jord., which is said to be a form of S. media, see 

 A. Schulz; it is cleistogamous, with petals either small or 

 absent, like S. media var. brachypetala, and with 2 — 3 sta- 

 mens). Here self-pollination appears to give excellent results. 



The flowers vary considerably in size and in the length 

 of the petals relatively to the calyx. Lange mentions a form 

 apetala. Some of the flowers, viz. the largest, have all the 



