252 PATAGONIAN EXPEDITIONS: BOTANY. 



VALENTINIA Speg. 



Calyx 5-parted, with lanceolate lobes, not enlarging after flowering. 

 Corolla-tube cylindrical, lobes 45, imbricate, obovate, partly fugacious. 

 Filaments very short, anthers distinct. Style short, with short broad 

 stigma. Cells i -seeded. Small shrubs, with low branches ; leaves some- 

 what fleshy, obovate, orbicular, decussate. Flowers small, in simple or 

 3-partite cymes. 



V. PATAGONICA Speg. 



The difference of habit and the appressed fleshy leaves mark this. 

 Fruit with scanty, fleshy exocarp and no endosperm. 

 Patagonia, by Rio Chubut. 



Insert after Candolleacea, p. 756, after line 18 of the page: 



Mildbraed on the Stylidiacece shows that we must amend our descrip- 

 tion of this family, so as to admit the genus Donatia, hitherto referred to 

 the Saxifragacece (Macl., p. 460). Though Donatia is choripetalous, and 

 its stamens are free from the style, and the Patagonian plant has trimerous 

 androecium, and tricarpellary ovary, it appears to belong to the family of 

 the Stylidiacece; so that the characters of the family must be: 



Calyx adnate to the ovary; corolla rarely choripetalous, generally 

 sympetalous and more or less zygomorphous ; stamens rarely 3-2, and 

 free ; mostly 2 and coalescing with the style into a stylidium ; anthers 

 always extrorse ; ovary rarely 3-merous, generally 2-merous. 



STYLIDIACE.E. 



Are allied to Campanulaceae, differing by having irregular flowers, with 

 3-2 stamens connate with the style into a column ; leaves often spuriously 

 whorled. (Chiefly in Australia, and the Pacific Isles.) 



Suggestive gradations are observable, as epigynous glands represent- 

 ing absent parts, and the approximation of stamens to the style in the 

 New Zealand genus Donatia, being a step towards their coalescence as 

 in the other genera. The Patagonian, and the New Zealand-Tasrnanian 

 forms of Donatia, exhibit the parallelism, and at the same time the varia- 

 tion of numbers of parts ; thus 



Stamens 3, ovary 3-celled. Antarctic American. Donatia fascicularis. 



Stamens 2, ovary 2-celled. New Zealand, Tasmania. D. nova zealandice. 



