- 238 — 



not densely covered with stellate hairs; it gives rise to many 

 and long epiterrean stolons. It is allied to H. magyaricum N. & 

 P., and under this name I have used the species for castration 

 experiments in 1903 (Ser. 1 3), without knowing that castration was 

 not at all necessary, only isolation. The Plate gives a picture of 

 an old corymb and of a young one (Figs. 1 & 2). 



I could not find the species-name excellens in any botanical 

 work, but the register of the Botanical Garden gave the evidence, 

 that seeds with this name were received from the Botanical Garden 

 of Lemberg in Galizia in 1889, and that since then the plant 

 has grown in our garden. I then wrote to the Garden of Lem- 

 berg, but did not get any answer. Later Professor Blocki of 

 Lemberg has written to me, that the species was named by him 

 without description, and as I asked him to give a description and 

 sent him a dried specimen of my plant, he has been so kind to 

 work out the following description for which I beg him to rèceive 

 my best thanks. He points out that the cultivated specimens agree 

 fully with his original ones: 



"Das mir zugesandte Hieracium ist in der That durchaus conform 

 mit meinem Hier. excellens, dessen Diagnose ich Ihnen hiermit zu- 

 kommen lasse: 



Hieracium excellens Blocki, n. sp. 



Sectio Praealtina Näg. et Pet. Rhizoma breve crassiusculum, 

 semper stoloniferum ; stolones valde elongati, tenues, non adscendentes, 

 interdum florentes, foliis lanceolatis numerosis instructi; caulis ad 

 80 cm. altus, minute striatus, haud fragilis, 3 — 4-phyllus, laxe 

 paniculato-corymbosus, polycephalus, dense stellato-floccosus et prae- 

 terea in inferiore parte pilis setulosis, in superiore glandulosis (1 mm. 

 longis) parcissime vestitus; pedunculi inflorescentiae inferiores 

 remoti, superiores approximate omnes densissime canofloccosi et 

 parce glandulosi pilis longioribus basi nigricantibus intermixtis; 

 folia haud denticulata, rosularia sat numerosa, exteriora sub anthesin 

 sicca, reliqua persistentia, lanceolata, acuta, ad basin sensim 

 attenuata, ad 20 cm longa, 1-5—2*5 lata, folia caulina sensim decres- 

 centia, inferiore caulis parte inserta, omnia glaucescentia, pilis setu- 

 losis 1 mm longis supra spectantibus ciliata, supra praeter setulas 

 1 mm longas rarissimas nuda, subtus -j- dense canofloccosa nervoque 

 medio setulis ciliata ; folia virginea in utraque pagina dense stellato- 

 floccosa; capitula parva (5 mm longa), dense stellato-floccosa et 



