


oe eM § 
Umbellaceae 283 
G. Fruit 6—8 mm. long, its lateral wings thick, corky. W. 
; A. arguta Nutt. 
GG. Fruit 4—6 mm. long, its lateral wings not corky-thickened. W. C. 
he A. lyallii Wats. 
FE. Fruit not glabrous; pedicels not distinctly united at base. 
H. Fruit hispid; flowers white. E. (Selinum kingii.) 
A. kingii C. & R. 
HH. Fruit papillate; flowers greenish or purplish. E. 
A. roseana Hend. 
=DD> Oil-tubes | in each dorsal interval, and 2 in each lateral one; flowers pink- 
isha. F,. A. canbyi C. & R. 
GLEHNIA 
Low, tomentose-villous, on the sands of the seashore. Leaves |—2-ternate or ter- 
nate and then pinnate, coriaceous; leaflets ovate to roundish, more or less confluent, densely 
white-tomentose beneath, callus-serrate to dentate, 2.5——5 cm. long. Flowers whitish, 
in head-like clusters; umbel-rays 1012, 12-24 mm. long, involucre and involucels of 
subulate bracts. Calyx-lobes small. Fruit globose, glabrous, 8—10 mm. in diameter; 
carpels somewhat flattened dorsally, winged; wings 5, equal, 3 mm. wide, corky, thick- 
ened; lateral wings distinct from those of the other carpel; stylopodium depressed; oil- 
tubes 2—3 in each interval but appearing equally distributed, 4—6 on the commissure 
side. (Probably Gk. glenos—a thing to stare at, because it is so woolly.) W. (Phel- 
lopterus littoralis. ) G. littoralis Schmidt 
PHELLOPTERUS 
Plant, low; acaulescent or nearly so. Leaves pale, 1—3-pinnate; usually the leaf- 
segments short, wide, crowded, somewhat confluent. Flowers purple (ours) ; mostly the 
involucre and involucels conspicuous (so in ours), similar, more or less hyaline. Calyx- 
lobes evident. Fruit oblong or orbicular (ours), glabrous, 10—12 mm. long (ours) ; 
carpel-wings 3—5, wide, thin throughout or very nearly so; lateral wings distinct from 
those of the other carpel; stylopodium none; oil-tubes 2——3 (ours) in each interval, 
4(ours)—8 on the commissure side. (Gk. phellos—cork, pteron—a wing; referring 
to the wings of the fruit.) E. P. purpurascens C. & R. 
PTERYXIA 
Acaulescent or nearly so, clothed at base with the persistent leaf-sheaths. Leaves 
bright green or somewhat pale green, clustered at the stem-base; main division ternate and 
then pinnately finely dissected; segments short, linear, somewhat hard-pointed. Flowers 
yellow or white; involucre usually none; involucel-bracts narrow, not at all hyaline. Calyx- 
lobes evident. Fruit oblong to orbicular, glabrous; carpel usually strongly flattened dor- 
sally; carpel-wings thin thruout; lateral ribs broadly winged; dorsal and intermediate ribs 
from strong-ribbed to broad-winged; stylopodium none; oil-tubes several in each interval. 
(Gk. pteryx—a bird’s wing; from the wide fruit-wings.) 
A. Flowers yellow. 
B. Leaf-segments pale, narrow, rigid. FE. (Cymopterus terebinthinus. ) 
P. terebinthina ©. & R. 
BB.  Leaf-segments greener, not so rigid. 
C. Leaves of wide outline. 
