Spring Flora of Oklahoma 
95 
IX. TITHYMALUS (Tourn.) Adans. 
Annual or perennial herbs, with simple or branched 
stems, which are topped by several-rayed umbel-like cymes. 
Leaves below the umbel usually scattered or alternate. 
Bracts of the umbel quite different from the stem-leaves. 
Blades entire or toothed. Glands 4, the missing one rep¬ 
resented by a thin, often ciliate, lobe. Capsule exserted, 
smooth or tuberculate. 
1. Tithymalus missouriensis (Norton) Small. Reticulate- 
seeded Spurge. Annual, glabrous. Stem erect, 4'-15' high, topped 
by a compound 3-rayed umbel. Leaves, except those subtending 
the umbel, scattered, spatulate or oblong, 5"-18" long, serrate to 
below the middle. Involucres solitary in the axils. Capsule 1 
in diameter, with elongated warts. I 
Plains and prairies. May-August. 
X. POINSETTIA Graham 
Annual or perennial herbs or shrubby plants, with green 
or partially often more highly colored, foliage. Leaves al¬ 
ternate below, opposite above, similar throughout or very 
variable. Stipules gland-like. Involucres in axillary or 
terminate cymes, or solitary, the lobes fringed. Glands 
fleshy, solitary, or rarely 3 or 4, sessile or short-stalked, 
the missing ones represented by narrow lobes. Capsule 
exserted, the lobes rounded. 
1. Poinsettia hetrophylla (L.) Kl. & Garcke. Various-leaved 
Spurge. Annual or biennial, pubescent or nearly glabrous. Stem 
erect, l°-3° tall, leafy at the ends of the branches. Leaves alter¬ 
nate, 6'-12' long. Leaflets 9-21 ovate-lanceolate or oblong-lance- 
or dentate, the uppermost often fiddle-shaped and blotched with red. 
Involucres clustered at the ends of branches. Capsule 3" in diam¬ 
eter. 
In sandy soil. April-November. 
FAMILY 47. ANACARDIACEiE. Sumac Family. 
Trees or shrubs, with acrid, resinous, or milky sap, 
usually alternate leaves, and polygamo-dicecious or perfect, 
regular flowers. Leaves pinnately 3-many foliolate, or 
