Ambrosiaceae. 
271 
H. auriculiforme Fr. (auriculifolium Grml., Schultesii F. Sch.), not rare in 
some parts; H. Auricula-Pilosella velutinum — var. tiltophylluin N. P.; H. 
Auricula-tardans : H. tardiusculum N. P., valley of Entremont, Dole in the 
Jura; H. collinum-Pilosella: H. prussicum N. P. (repens Willd. ?)> Heidelmoos 
near Constance, beyond our boundaries; H. cruentum-Pilosella : H. Umbella 
N. P. col de l’Albula; H. cyraosum-Pilosella: H canum N. P., Wilchingen, 
Canton Schaffh.!!; H. florentinwn-furcatum : H. furcellum N. P., Zermatt 
(rather doubtful); H. florentinum-glaciale: H. frigidariufh N. P., Simplon; 
II. florentinum-Hoppeanum: H. arnoserioides N. P., valley of Viege ; H. floren¬ 
tinum-Peleterianum: H. bybridum Chaix nec alior., Zermatt, Nax ; H. floren- 
tinum-Pilosella: a. H. brachiatum Bert, (acutifolium Grisb., Hybridum Gaud, p.) 
forma intermedia, stolonifera, here and there; b. H. venetiauum N. P. (aridum 
Freyn) forma intermedia astolona, Zermatt, Orsieres, Bex ; c. H. adriaticum 
Nag. (caricinum Arv.-Touv. saltern p ) forma accedens ad florentinum, with a 
taller stem than the two last, heads 7—30, arranged in a corymb, Sion; H. 
florentinum-tardans : H. tephrodes N. P., Sion; H.furrafum-glaciale: H.permuta- 
tum N. P., Eastern Alp.; H.furcatmn-Hoppeanum: H. eurylepium N. P., Valser- 
iBerg, Spliigen; II. furcatum-PiloseVa: H. basifureum N. P., Eastern Alp.; 
H. glaciate-PiloseHa: II. glaciellum N. P., Graub., Wall.; H. glaciale-Pilosella 
velutinum: H. bypoleucum Arv.-Touv., II. velutellum N. P.; H. glaciale-Pele- 
terianum: II. finalense N. P-, Zermatt; H. glaciale-tardans: H. Faurei Arv.- 
Touv. (H. poliocephalum N. P.), Simplon; II. Hoppeanurn-Pilosella : H. hy- 
peuryium N. P., eastern Alp.; H. Peleterianum-Pilosella: H. pacbylodes P. 
Here perhaps H. Pilosella velutinum v. macristolonum from Eginenthal and 
Simplon; II. Pilosella-Zizianum ; H. albipedunculum N. P, Sion, Lourtier, 
Wilchingen. — Intermediate forms composed of 3 species are: H. auran • 
tiacum~ Auricula-fur catum : H. amaurocephalum N. P., Avers; H. Auricula- 
-collinum-florentinum: H. floribundum Wimm. Grab., Marbach*); H. Auricula- 
furcattfm-Hoppeanum : H. nigricarinum N. P., Eastern Alp ; II. cymosum sa- 
binum-glaciate-Pilosella : H. trichodes N. P., Col de Bernina.—The following 
forms still require further observation: H. aurantiacum-sabinum, B. S. M., 
St. Bernard; H. furcatum-incanum Lagg. in Grml. Beitr. 93, B. S. M. 37 
Eginenthal; II. glaciate- (Hoppeanum) piloselloides (Beitr. 93, Christeneri. 
Grml.), Albula; H. glaciale-sabinum (corymbulifolium Arv.-Touv. p.), B. S. 
M. 37, St. Bernard; H. Pilosella-sabiaum (biflorum Arv.-Touv.), B. S. M. 37, 
Reidigalp, Canton Bern.—With respect to the hybrids indicated by Briigger 
(see N. Beitr. Ill, 33) between the subgenus Pilosella and that of Euhieracium, 
as II. glaciale-glanduliferum, H. glancum-piloselloides, II. murorum-piloselloides, 
they are absolutely false. See also Nag. and Pet. mon. 523. 
OBS. II. Hybrids of the subgenus Euhieracium: H. lanatum-pictum 
(lanatellum Arv.-Touv.! saltern p. Simplon! Riddes ! Sion!); II. odiroleucum- 
valdepilosum (Engadine according to Christener); II. glctucum-villosum ? N. 
Beitr. I, 17); H. piliferum-villosum? (Torembec). 
OBS. III. Among the cultivated pis of this family we may enumerate 
also: Cynara Scolymus L., artichoke, and C. Cardunculus L., cardoon.—Also: 
Carthamus tinctorius L.—Cnicus benedictus L. 
59. Ambrosiacese. 
359. Xanthium. Bur-weed. XXI, 29. 
1. Spines at the base of the Is strong, yellow, 3-partite. 
Ls cuneiform at the base, with an elongated, acuminate 
middle lobe.—Rubbish heaps, hedges: introduced with 
wool from Hungary; observed near Geneva, Bern, Bale 
and Schaffh. 7 *spinosum L. 1438. 
*) H. floribundum is a collective species fairly distrib. in N. E. Europe; 
in Switzerland only the var. succisum Fr. is found, otherwise inhabiting the 
North almost exclusively. The pi. of Marbach then may well be an hybrid. 
