456 EUPHORBIACE^. (SPUKGE FAMILY.) 



E. HELiosc6piA, L. Stems ascending (6 - 12' high), stout; leaves all obo- 

 vate and very rounded or retuse at the end, finely serrate, smooth or a little 

 hairy, those of the stem wedge-shaped ; umbel divided into 5 rays, then into 3, 

 or at length simply forked; glands orbicular , stalked ; pods smooth and even; 

 seeds with coarse honeycomb-like reticulations. Waste places, eastward and 

 along the Great Lakes to Mich. July -Sept. (Nat. from Eu.) 



t- -- Leaves entire ; glands crescent-shaped or %-horned. 

 H- Seeds smooth and dark-colored ; perennials, with running rootstocks. 



E. feuLA, L. Stems clustered (lhigh); leaves lanceolate or linear, the 

 floral (yellowish) broadly heart-shaped, mucronate ; umbel divided into many 

 rays, then forking ; glands short-horned (brown) ; pods smoothish and gran- 

 ular. Mass., western N. Y., and Mich. ; rare. (Adv. from Eu.) 



E. CYPARfssiAS, L. Stems densely clustered (6-10' high); stem-leaves 

 linear, crowded, the floral heart-shaped ; umbel many-rayed ; glands crescent- 

 shaped ; pods granular. Escaped from gardens, common. (Nat. from Eu.) 



E. NIC^EENSIS, All. Stout and tall glabrous perennial ; leaves oblong or 

 ob'.ong -lanceolate, the floral broadly heart-shaped, mucronate ; terminal umbel 

 many-rayed, the rays forking ; glands short-horned ; pods finely wrinkled. 

 A rare escape; Binghampton, N. Y. (Adv. from Eu.) 



*-* ++ Seeds sculptured, ash-colored ; pod smooth; annuals or biennials. 



E. PEPLUS, L. Erect or ascending (5-10' high); leaves petioled, thin, 

 round-obovate, the upper floral ones ovate ; umbel 3-rayed, then forking ; 

 glands long-horned ; lobes of the pod 2-w ing-crested on the back ; seeds 

 2-f/rooved on the inner face, pitted on the back (scarcely over \" long). Waste 

 places, N. Eng. to N. J. and western N. Y. (Adv. from Eu.) 



19. E. commut&ta, Engelm. Stems branched from a commonly de- 

 cumbent base (6-12' high); learns obovate, obtuse; the upper all sessile, the 

 upper floral ones roundish-dilated, broader than long ; umbel 3-forked ; glands 

 with slender horns; capsule obtusely angled ; seeds ovate, pitted all over (1" 

 long). Along streams and shady slopes, Md. to Fla., Minn., and Mo. 

 * * * Glabrous annual or biennial with entire opposite and decussate leaves, an 

 umbelliform inflorescence, and short-horned glands. 



E. LATHYRIS, L. Stem stout (2-3 high) ; leaves thick, linear or oblong, 

 the floral oblong-ovate and heart-shaped; umbel 4-rayed, then forking. 

 Sparingly escaped from gardens, N. Eng. to N. C. (Adv. from Eu.) 



2. PACHYSANDBA, Michx. 



Flowers monoecious, in naked spikes. Calyx 4-5-parted. Petals none. 

 Ster. Fl. Stamens 4, separate ; filaments long-exserted, thick and flat ; an- 

 thers oblong-linear. Fert. FL Ovary 3-oelled ; styles 3, thick, awl-shaped, 

 recurved, stigmatic down their whole length inside. Ovules a pair in each 

 cell, suspended, with the rhaphe dorsal (turned away from the placenta). 

 Capsule deeply 3-horned, 3-celled, splitting into 3 at length 2-valved 2-seeded 

 carpels. Nearly glabrous, low and procumbent perennial herbs, with matted 

 creeping rootstocks, and alternate, ovate or obovate, coarsely toothed leaves, 

 narrowed at base into a petiole. Flowers each 1 - 3-bracted, the upper stam- 

 inate, a few fertile ones at base, unpleasantly scented ; sepals greenish or 

 purplish; filaments white (their size and thickness giving the name, from 

 Traxtis, thick, and dvfjp, used for stamen). 



1. P. prOGlimbens, Michx. Stems (6-9' long) bearing several ap- 

 proximate leaves at the summit on slender petioles, and a few many-flowered 



