Stamens in 2 rows: flowers not yellow.......... ccc ese e cee cee eee ences 3, 4, 5
Stamens in 1 row; filaments broadening downward.................-.20eeeeeee: 6
Stamens in 2 rows or nearly equal: flowers yellow. ...............0000eeeeeee 7,8
Perianth-tube short; segments rotate, yellow: filaments with appendages........ 9, 10
Perianth open-campanulate, cleft below the middle: stamens in l row.......... 11, 12


l. T. grandiflora, Lindl. Pedicels 4-1 in. long, numerous: perianth light blus, 1 in.
long: lower anthers sessile, upper on filaments which are winged below. Or. and
Wash. E.
2, T. Howellii, Greene. Similar: upper filaments winged above. Or. & Wash.
3. T. candida, Greene. Scape 2-4 ft. high: perianth 14 in. long, white: filaments
coiled. Discovered by J. R. Scupham. Fresno Co., Cal., June 1886.
4 T. laxa, Benth. Umbel of usually 15-30 purple-blue flowers: anthers acute, Cal


118 LILIACEX


6. T. peduncularis, Lindl. Pedicels often 6-10 in. long: perianth rose-purple to
nearly white, cleft below the middle, 1 in. long: anthers retuse. Wet places
Cent. Cal.
6. T. Bridgesii, Greene. About a rvvt high: umbel rather few-flowered: perianth
light blue. Very common in open forests about Humboldt Bay. Chico.
7. T. crocea, Greene. Perianth 7-9 lines long: lower filaments very short. N. Cal.
8. T. gracilis, Greene. Smaller: filaments subequal: anthers acute. S. N. Mts.
9. T. ixioides, Greene. Scape 4-2 ft. high: filaments unequal, wing-dilated, 2-append-
aged above. 8S. Cal. to Or.
10. T. lugens, Greene. Similar: perianth dark brown outside: winged filaments not
forked above. Collected by E, L. Greene near Vacaville, Cal., May 4, 1886.
11. T. hyacinthina, Greene. Perianth white with green veins, rarely purple-tinged:
filaments broad at base, united into a ring. Moist ground. Cent. Cal. N.
