Carolus Hermannus Zahn: Hieracia Caucasica nova. 179 
its single-flowered peduncles of light yellow flowers, striped with red- 
purple at the base of the segments, and covered outside with a very 
dense white tomentum. The pollinia are eight, and quite typical in 
character. 
31. Bonatea antennifera R. A Rolfe, l. c., p. 450. 
Plant about 3 feet high, with somewhat glaucous stem, leafy up to 
the inflorescence. Leaves oblong, subacute, spreading, with an amplexy- 
caul base, 3—6 inches long,. the upper somewhat smaller, and passing 
into the bracts. Raceme lax, many-flowered, about 9 inches long. Bracts 
lanceolate, acuminate, convolute round the pedicels at the base, 1—2 inches 
long. Pedicels 2!/; inches long. Dorsal sepal elliptical, acuminate, very 
concave, 11 lines long; lateral pair obliquely oblong, acuminate, recurved 
at the apex, an inch long, with an acute tooth on the inner margin near 
the apex. Petals deeply bipartite, the posterior lobe linear, acute, ap- 
pressed to the margin of the dorsal sepal, anterior lobe filiform, 1*/, inches 
long. Lip tripartite; side lobes filiform, over 2 inches long; front lobe 
linear, recurved, sharply bent about the middle, 1!/, inches long; spur 
1*/, inches long, slightly thickened at the apex. Column and three-lobed 
rostellum each 4 inches long. Stigmas clavate, 10 lines long. 
Rhodesia: C. F. H. Munro (Flow. at Kew.!). 
XLIX. Hieracia Caucasica nova,') 
a D. Litwinow, Petropolitano, annis 1905 et 1906 
in Caucaso boreali lecta.?) 
Auctore Carolo Hermanno Zahn, Caroloruhensi. 
(Originaldiagnosen.) 
A. Piloselloidea. 
Sectio Pilosellina, 
1. Hieracium pilosella L 
Subspecies sericostolonum Litwinow et Zahn (Grex Trichophorum N. P.). 
Caulis unus, tenuis, ad 30 em altus. Folia lanceolata acutiuscula v. 
acuta, interdum breviora et sublatiora, viridia. Involucrum 10—11 mm 
longum ovatum rotundatum; squamae angustae, subnigrae distincte viridi- 
Tmp ata Pili in involucro densi, subobscuri basi atri, 1—1,5 mm longi, 
1) Ber sat magnus specierum novarum a cl. Litwinow in Flora 
Rossica exsiecata publicabitur. 
2) Addimus species nonnullas novas iam a cl. Ruprecht in Uaucaso 
orientali lectas et in herbario Academiae Petropolitanae conservatas, pariter ac 
Species nonnullas iam descriptas, sed in Caucaso adhuc non lectas, a cl. Lit- 
winow primum inventas. 
12* 
