1820.] Plujsical Science dttriNg the Year '[Sid. 117 



Argyleshire rose as distinct from Rosa arvensis. The characters 

 as drawn up by Mr. D. Don are Rosa arvensis ; shoots very h)ng, 

 procumbent ; leaflets ovate, unequally serrated, hairy on the 

 under side only; fruit ^lobular ; peduncles nearly naked : Rosa 

 capreolata, the Jlrgylesidre rose ; shoots flagelliform, procumbent; 

 leaflets elliptic, unequally serrated, quite bald ou both sides; 

 fruit ovate, contracted at the neck; peduncles glandular. 



Hygrobecp. — Goldbach, in a Spicilcgiuni Flora; Mosquensis, 

 corrects the specific differences of the two species of callitriche 

 1. C. pallens; upper leaves aggregated, seeds scarcely margined 

 on the back ; C. verna, Linn. 2. C. virens; leaves uniform, equi- 

 distant; seeds margined, back membranaceous; C. autumnalis, 

 Linn. jMem. Mosq. 



FicoidecB. — A very handsome species of cactus, called, from 

 its beauty, C speciosissimus, which flowered in the Jardin (lit 

 Roi, is described and figured by M. Desfontaines. Ivleni. JSlm. iii. 



Suxijragece. — Mr. R. Brown has given a notice of three new 

 species of saxifraga in the Appendix to Captain Ross's Nari'ative 

 of his Northern Expedition. 



UnibelUferce. — Sprengel has examined afresh several of these 

 plants, whose family character is so strongly marked, that their 

 specific differences are peculiarly difficult to determine. He 

 thinks the true character of the physospermum of Cusson should 

 be seeds ovate, obtusely angular, included in a striated loose 

 utricle; involucrum, both general and partial, many-leaved; the 

 type of the genus being the P. commutatum of Sprengel; ligus- 

 ticum Cornubiense Linn. He forms a new genus, under the 

 name of Dondia, and characterizes it thus : — Fruit oblong, nar- 

 rowed at each end, furnished with four folds, and as many arches ; 

 involucrum single, 5-leaved, leaflike; flowers capitate, female 

 and hermaphrodite sessile, male peduncled, with .5-cut persisting 

 calyces: the type being D. epipactis Spr. astrantia cpipactis 

 Willd. He has also laboured upon that confused genus, ca- 

 chrys, and enumerates five species of it. His character of Smyr- 

 nium is — Fruit ovate-subrolund, three-rilibed ; albumen includ- 

 ing, involute; involucra scarcely any: and he considers S. olu- 

 satra as the type. To this information he has added some re- 

 marks on the genus bupleuruin. jMcm. JMoscj. 



Sir James E. Smith, the President of the Linnaean Society of 

 London, has amended the specific differences of two species oS 

 tordyllium, and has given as the characters of T. officinale; In- 

 volucells as long as the flowers, leaflets ovate, cut, crenate; petals 

 radiant, double, unequally 2-lobcd : and thos3 of T. apulum; 

 Involucells shorter than the flowers, leaflets jagged, the upper ones 

 narrower; petals radiant, solitary, unequally 2-lobed. Li/in. Trans. 



Ruhiacecp.. — A new genus, ancylanthos, is establislicd, ;ind one 

 species of it, A. rubiginosa, is described and figured by Desfon- 

 taines. Mem. Mas. WW. 



Bonpidecp. — Mr. R. Brown has formed a new natural family, 



