800 EUPHORBIACEAE 
T. paniculata ee pir - Plant deep-green, 3-9 dm. tall: psg blades 
elliptis to oval, 2- . long: involueres are few, about 1.5 mm. long: 
appends ages white, suborbicular, a at reniform, or somewhat 4- sided: cap- 
sule 3—3.5 mm. broad: seed 2.5 mm. long. Sandy or rocky woods, Coastal Plain 
and adj. a Ga. and Ala. to N. C.—Spr.—fall. 
27. GALARHOEUS Haw. Annual or perennial herbs or partially woody 
plants, the stem topped by an umbel. Leaf-blades entire or wi toothed. 
Stipules ‘wanting. Involueres in open or compact cymes, each with 4 naked or 
appendaged glands. Capsule smooth or tuberculate. ‘seed ST grooved, 
reticulate, or smooth. [Tithymalus (Fl. SE. U. 8.)]—About 250 species, 
widely distributed.—Sum.—SPURGES. EUPHORBIAS. 
Leaf-blades entire. 
Leaves of the stem mainly opposite and decussate: capsule 1.5 mm. wide or more. 
I. LATHYRI. 
Leaves of the stem alternate or scattered: capsule 1 cm. 
wide or less. 
Braets or leaves of the HE ence a UCHOS (rays) 
opposite: rays simple or dichotomou 
Stem topped by a repeatedly forked "o EIE II. PEPLI. 
ees topped by an umbel-like simple or sparingly 
orked E III. CYPARISSIAE, 
Bra a or leaves of the inflorescence-branches (rays) 
As rnate: rays trichotomous. IV. TRICHOTOMI. 
Leaf-blades gertuia te. V. OBTUSATI 
I. LATHYRI 
Annual or biennial coarse plant: leaf-blades entire: glands 
of the involucre crescent- shaped. 1. G. Lathyrus. 
II. PLI 
Glands of the involucre without horndike p 
Glands with erose-crumpled edge 2. G. floridanus. 
Glands entire or merely undula Bee 
Bracts of the rays longer than broad. 
Stem-leaves with narrowly oblanccdinte to linear 
blades. 3. G.inundatus. 
Stem-leaves with obovate, spatulate, or oblanceo- 
us e blades. 4, G. telephioides. 
Braets of the rays fully as broad as lon 5. G. Darlingtonii. 
Glands of the involucre luńate or aeea a d by horn- 
e processes. 
vate-reniform or reniform: seeds pitted. 6. G. commutatus. 
Stem -1eaves with linear blades: bracts deltoid: seeds 
reticulate. 7T. Œ. austrinus. 
Surfaces of the seeds longitudinally grooved or with large 
pits in en rows: capsule with prominently 
keeled lobes 8. G. Peplus. 
III. CYPARISSIAE 
Plants growing in dense colonies, the stems with numerous 
very narrow leaves, topped by a many-rayed umbel. 9. G. Cyparissias. 
IV. TRICHOTOMI 
Fleshy plant with few or many stems or ugs 10. G. trichotomus. 
V. OBTUSATI 
Capsule smooth. 11. G. Helioscopia. 
Capsule warty. 
Lea Due U rounded at the tip, glabrous; seed retic- 
Blades of the cauline leaves with cordate or truncate 
blades, more or less auricled: glands of the invo- 
luere sta 12. G. obtusatus. 
Blades of the, cauline leaves narrowed to the base, not 
auricled : glands of the involucre sessile. 13. G. arkansanus. 
Leaves acute, A rei beneath; seed smooth. 14. G. platyphylla. 
