Floristische Notities 35–58

The third series of “Floristische Notities” contains, with a few exceptions, additions to the flora of the Netherlands from the years 1955 and 1956. No. 52 of this series is written by Dr. A. G. de Wilde, Sassenheim, no. 57 by Mr. E. W. Clason, Groningen. The series contains the following notes: 35, 44, 45, 46, 51, and 56. Amaranthus polygonoides L., Psoralea americana L., Trifolium cernuum Brot., Trifolium rubens L., Gilia multicaulis Benth. var. peduncularis (Eastw.) Jepson, and Verbesina encelioides (Cav.) Benth. & Hook. var. encelioides. First records of these aliens for the Netherlands, found in various localities; the numbers 35 and 45 near wool factories at Tilburg. 36, A specimen of Caltha palustris L. with flowers of the size of those of Ranunculus acris L. could possibly belong to var. ranunculiflora Schur. 37, 38, 39, 40, 41, 42, 43, 47,'and 49T ' Didesmus bipinnatus (Desf.) DC., Diplotaxis erucoides (L.) DC., Iberis parviflora Munby, Lebidium draba L. subsp. chalebense (L.) Thell. var. auriculatum (Boiss.) Thelh, Malthiola cf. oxyceras DC., Sisymbrium septulatum DC., Hippocrepis unisiliquosa L., Trigonella caelesyriaca Boiss., and Pimpinella puberula (DC.) Boiss. First records of these aliens for the Netherlands; all found along the river Meuse in the province of Limburg, near Obbicht, Grevenbicht and Meers, together with a large number of other adventitious species. It is not unlikely that diaspores of them at least partly have come from the wool factories along the Vesdre in Belgium. 48. Specimens of Oenanthe aquatica (L.) Poir. with purple flowers from the coast of the former Zuyderzee (IJselmeer). Possibly an autumnal form. 50. Cuscuta australis R.Br. found for the first time in the Netherlands, on Polygonum bungeanum Turcz. Earlier records of the species for this country appeared to refer to Cuscuta campestris Yuncker, as Van Ooststroom pointed out in Ned. Kruidk. Arch. 52, 1942, p. 165. The present authors do not agree with Hjelmqvist’s view that the greater part of the Netherlands specimens of C. campestris — 0 r r , . should belong to C. australis R.Br. var. cesatiana (Bert.) Yuncker. They are of the opinion that the Swedish findings, mentioned by Fljelmqvist as belonging to this variety, fall within the variability of C. campestris, , as do the plants that according to Hjelmqvist have been introduced in Sweden from Holland. Differential characters are given between C. australis and C. campestris. 52. Euphrasia borealis Townsend (by A. G. de Wilde). First record for the Netherlands. Discussion of differences between this species and E. brevipila Burnat & Gremli, E. stricta Host and E. suecica Murb. & Wettst. 53 and 54. Verbascum nigrum L. var. gymnostemon Rchb. and Anthemis cotula L. f. discoidea Baguet. First records for the Netherlands. 55. Tragopogon dubius Scop., a native of South and Central Europe was twice found in the southern part of the Netherlands. It seems not unlikely that this species will soon become naturalized with us. 57. Potamogeton X decipiens Nolle ex Koch (by E. W. Clason). First record for the Netherlands of this hybrid the putative parents of which are P. lucens L. and P. praelongus Wulf. 58. A number of plants escaped from cultivation.