KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 50. N:0 3. 



31 



dwarf terrestria] form of that species, There is indeed a great difference in the size 

 of the plants, and tlie leaves are mostly different, but narrow, linear, entire leaves 

 occur also in R. pseudotndlifoUus. Their mode of growth is the same and, as will 

 be seen below, there is very little difference in the structure of the flowers. R. 

 fseudotridlifolius has a httle larger and broader sepals, longer and more Hnear petals, 

 with the glandular pit almost exactly in the middle and with the claw percursed by 

 3 nerves through its whole length. The stamens are sHghtly larger and the carpels 

 have a thicker style, which is slightly shorter in the ripe ones. These characters, 

 which I have discovered by means of a miniite comparison between numerous spe- 

 cimens, may, hovvever, prove to be sufficient. Anyhow, as I have not seen any 

 transitions between this and R. pseudotrullifolius, I prefer to keep them distinct. R. 

 coBspitosus is also nearly related to R. Moseleyi Hook. fil., which differs mainly in 

 the form of the style and in the small number of carpels. Dusén's opinion that his 

 species is nearly related to R. Montteanus Phil. is entireh^ wrong. The latter belongs 

 to the same type as R. hiternatus and may even prove to be a form of that species. 



Fig. 4. Ranunculus biternatus X caespitosus: a sepal, b — o petals, d — f carpels, g half niature 

 achene, all X 10; h stigma, more enlarged, i — k leaves. X 4. 



E. F., on the margin of a pond near Moiint William (Birger!) among gravel together 

 with R. hiternatus on the shore near the farm in North Arm ! — Fuegia. 



*931. R. biternatus XcaBspitosus nov. hybr. 



Intermediate between the parents. Leaves simple, linear-spathulate, or generally 

 deeply 3-cleft, lobes lanceolate or obovate, obtuse or acutate, side lobus of ten divided, 

 endlobe sometimes trilobate. Flowers sessile or shortly pedunculate, small as in R. 

 ccespitosus, sepals 3, petals 3, stamens c. 10, hardly 1 mm., mostly sterile, carpels 

 with erect, rigid style, with long papillse on % of the inner surface. Ripe achenes 

 not seen. E. F., among the supposed parents at North Arm! 



119. R. hydrophilus Gaud. 



Varies as to size, in water up to 10 cm. high, on moist clay only 2—3 cm. 

 Rosulate, sometimes stoloniferous. Flowers on a short pedicel, 4—5 mm. across. 

 Sepals 5, ovate, 2,2x155 mm., cucullate, petals 5, spathiilate, 2x1,5 mm., with 

 orbicular limb and sharply defined claw, occupying V2 of the entire length, yellow. 

 Glandular pit comparatively large. Stamens 5, c. 1,8 — 2 mm. long. Carpels c. 15, 

 rugulose, 1 — 1,6 mm., style 0. — 



