Vor. 31 No. 9 
BULLETIN 
TORREY BOTANICAL CLUB 
4 SEPTEMBER, 1904 
Studies in the Asclepiadaceae — VIII 
A NEW SPECIES OF ASCLEPIAS FROM KANSAS AND TWO POSSIBLE HYBRIDS FROM NEW YORK 
ANNA MURRAY VAIL 
(WITH PLATES 16-19) 
Asclepias kansana sp. nov. 
Stems erect, very stout, canescently tomentose throughout, 2 
dm. (or more?) high: leaves approximately opposite, short- 
petioled ; basal blades broadly oblong-ovate, truncate and rounded 
at the base, obtuse and mucronulate or emarginate at the apex, the 
upper ones elliptical-oblong, also mucronulate or more often 
emarginate, the lower ones 13-16 cm. or more long, g-II cm. 
wide, the upper ones 9—14 cm. long and 4.5—9 cm. wide, minutely 
tomentose or becoming glabrate above, densely canescently 
tomentose beneath, becoming less so with age, the midvein very 
broad and conspicuous, the primary veins wide-spreading ; petioles 
stout, I-1.5 cm. long: umbels several, axillary on the upper part 
of the stem, peduncled, many-flowered ; peduncle 3-7 cm. long ; 
_ pedicels 2~3 cm. long, tomentose : calyx-segments oblong-lanceo- 
late: corolla-segments (pink-purple ?), oblong, 7-8 mm. long, 
tomentose on the outside ; hoods oblong, about 4 mm. long, erect 
but diverging at the obtuse apex (pinkish ?), the lateral margins 
infolded with a broad obtuse tooth on each side at about the 
middle, the tips of which meet under the exserted incurving horn ; 
horn falcate, affixed near the base of the hood, and incurving over 
the edge of the anthers: follicles erect, on recurved pedicles, 
8-10 cm. long, 3-3.5 cm. wide, obtuse at the curved apex, 
densely white-tomentose, echinate with numerous soft spinose 
Processes that vary in length from 3-10 mm.; seeds 8 mm. long. 
(PLarE 16, FIGURE 4; PLATE 18.) 
SE aisha, 
_ [The preceding number of the BULLETIN, Vol. 31, No. 8, for August, 1904 
(31: 415-456, p/. 15) was issued 26 Au 1904.] 
457 
