158 PITTONIA. 
leaves mainly a terminal subopposite involucral pair, ovate- 
faleate, conduplieate, enfolding the 5—8-flowered umbel, one 
or two small eauline ones, when present, narrower, with a 
short sheath and a single flower in the axil : pedicels slender, 
a line long or more: calyx purplish and rather scarious, 2 
lines long or more, narrowly elliptical, acute at base, parted 
to the base on one side, slightly cleft at apex on the other, the 
margins sparsely ciliolate : corolla deep rose-purple, the tube 
a half inch long, limb 6—8 lines broad, lower lobe obovate- 
reuiform, as large as the two upper, which are narrower: 
stamens nearly equaling the corolla, filaments naked ; con- 
nectives of the anther capillary rather more than a half line 
long, only under a good magnifier appearing broader and 
flattened at summit, widely divergent or somewhat deflexed ; 
anther-cells orbienlar. 
This curious. little plant must surely be a congener of the 
rare and little known Tradescantia leicndra, Torr., which 
Mr. C. B. Clarke (DC. Monogr. iii. 318) has referred, with a 
doubt, to the Central American genus, Zebrina. 
CALOCHORTUS VENUSTULUS. Bulb ovate, an inch long, near 
the surface of the ground: stem 6—10 inches high, slender, 
branching and flexuous, with a grassy leaf at each node, the 
solitary radical leaf broader but linear: peduncles slender, 
equaling the leaves: flowers erect, open-campanulate or pos- 
sibly nearly rotate, white or cream color : sepals narrowly 
oblong, 6—8 lines long, obtuse, mucronulate, colored like the 
petals and equaling them in length, glandless and with or 
without a small tuft of long hairs near the base: petals 
obovate-oblong, obtuse, naked above, the lower portion hairy 
in the middle and along the margin: gland not obvious. 
cous, acute or acuminate, the strize hirsute: corolla deep blue, 8 lines 
long, the concave upper lip woolly outside. —B rought, by an unknown 
collector, from Maria Madre, of the Tres Marias group of islands, off the 
coast of Mexico. The specimens are in the herbarium of the California 
Academy, the ticket indicating the above named locality, and bearing 
the date, April, 1877. 
