PLANT NOTES FOR 1913, ETC. 



311 



435 (2). Hypericum Desetangsii Lamotte Bull. Soc. Fr. xxi, 

 121, 1874. Mr C. E. Salmon (Journ. Bot. 317, t. 528, 1913), records 

 the above plant from Lewes, Sussex. He distinguishes it : — 

 from H. perforatum by its 4-angled stem, shape of leaves, less narrow 



sepals ; 



from H. quadrangulum by its translucently dotted leaves with veins 



less anastomosing and narrower sepals ; 

 from H. acutum by its size [larger] flowers, shape of leaves [large oval- 

 elliptic, or elliptic-oblong, rounded at apex, narrowed at base, 

 sessile, dotted, and with transparent secondary veins which are 

 but little branched]. 

 According to Mr Salmon it is the H. intermedium Bellynck, Fl. 

 Namur 31, 1855, which was described as " Tiges de 3-9 dec, fermes, 

 dressees, rameuses, a 4-angles peu saillants et non ailes. Feuilles 

 ovales-oblongues, toutes parsemees de gros points noirs et de points 

 transparents tres nombreux ; a nervures non reticulees. Sepales 

 lanceoles-acumines. Petales striees de noir, depassant longuement le 

 calice. Fleurs assez grandes, d'un jaune dore, en panicules terminales." 

 It was first found near Lewes, Sussex, by the late Mr T. Hilton. 

 Dr A. Thellung in Allgemeine Botanische Zeitschrift 5, vii., 1912, has 

 a paper on this plant from which Mr E. D. Marquand has kindly 

 transcribed the following : — 



On a misunderstood Hypericum of the Flora of South 

 Germany. (II. Desetangsii Lamotte. ) 

 This form of Hypericum stands in close relationship to H. per- 

 foratum L. II. maculatum Crantz (H. quadrangulum auct.) and 

 H. acutum Moench (tetrapterum Fr.) from which species it has not 

 hitherto been separated in South Germany, and between which, 

 as regards morphological characters, it occupies in a certain sense an 

 intermediate position, as the following summary in the shape of a 

 dichotomous key will make clear. 



1. Internodes of the stem always with 2 longitudinal ridges. 

 Valves of the fruit with 1 — 3 ( — 5) longitudinal resinous ridges, and 

 numerous elongated club-shaped obliquely-placed resinous pustules 

 arranged in rows. Sepals always acute, mostly narrow. — H. per- 

 foratum L. 



1.* Internodes of stem with 4 longitudinal ridges (of which 

 2 are often feebly developed). Fruit valves with numerous longi- 



