EUPHORBIACEAE 707 
nate with a calyx of 5 partially united sepals. Stamens 10, in 2 series: filaments slender, 
those of the inner series attached to the lobes of the disk: anthers opening lengthwise. 
Pistillate flowers with a calyx similar to that of the staminate but the tube often shorter. 
Ovary 3-celled : styles 3, slightly united at the base. Ovules solitary in each cavity. 
Capsule 3-celled. Seeds solitary in each cavity. 
Leaf-segments lobed. 1. M. Carthaginensis. 
Leaf-segments entire. i 2. M. Manihot. 
1. Manihot Carthaginénsis (Jacq. ) Muell. Arg. Stems 4-10 dm. tall, often spar- 
ingly branched : leaf-blades orbicular or reniform in outline, 3-5-lobed, 8-12 cm. broad, 
the lobes ovate, fiddle-shaped, pinnatifid or the lower ones undulate, acute or acuminate ; 
petioles about as long as the blades or shorter: racemes few-flowered : calyx of the stami- 
nate flowers salverform, the lobes linear or linear-lanceolate: pistillate flowers below the 
staminate ; tube none or very short; lobes linear or linear-lanceolate: bracts surpassing 
the pedicels. 
In sandy soil, southern Texas to Mexico and tropical America. 
2. Manihot Manihot (L.) Cockerell. Stems 1-1.5 m. tall, more or less branched : leaf- 
blades 3-7-parted, the segments linear to elliptic, or slightly broadest above the middle, 
acute or acuminate, entire ; petioles about as long as the blades or longer : panicles spread- 
ing, often glaucous: bracts shorter than the pedicels: calyx campanulate, 7-8 mm. high ; 
lobes ovate, obtuse, about as long as the tube ; calyx of the pistillate flowers with a shorter 
tube than that of the staminate. [M. ulitissima Pohl.] 
In sandy soil, Keys of Florida and tropical America. 
23. CHAMAESYCRH S. F. Gray. 
Annual or perennial herbs or shrubs. Stems often radially branched at the base, the 
branches ascending or prostrate, sometimes creeping, forking. Leaves opposite: blades 
entire or toothed, more or less oblique at the base : stipules delicate, entire or fringed. In- 
volucres solitary in the axils or in axillary cymes: glands 4, sessile or stalked, naked or 
usually with an appendage, one sinus of each involucre glandless. Capsule smooth, some- 
times pubescent, the angles sharp or rounded. Seeds angled, with minute caruncles, white 
or black, the faces smooth or transversely wrinkled. SPURGE. 
A. Leaf-blades entire. 
Plants with relatively prostrate stems or branches. 
Annuals or biennials. 
Seeds over 1.5 mm. long. 
Leaf-blades fully thrice as long as broad, acute or apiculate: capsules 
3-4 mm. long. 
Leaf-blades twice as long as broad, obtuse or retuse: capsules 2.5 mm 
ong. 
Seeds less than 1.5 mm. long. 
1. C. polygonifolia. 
2. € Ingalisii. 
Seeds barely 1.5 mm. long: species terr "rae |. 8. €. Geyer, 
an. 
Ultimate divisions of the inflorescence open cymes. 4. C. ammannioides. 
Ultimate divisions of the inflorescence raceme-like clusters. 5. C. Nashii. 
6. C. Chiogenes. 
Foliage and capsules glabrous. 
Stipules toothed : appendages of the glands minute or obsolete. 7. C. serpens. 
Stipules : DDR of the eadi petal-like. 8. C. cordifolia. 
cled ; glands red: seeds nearly smooth. 9. C. brachypoda. 
glands nish brown: seeds transversely wrinkled. 10. C. Laredana. 
Leaf-blades apiculate : capsules pubescent all over. 11. C. Garberi. 
Fordactals Leaf-blades obtuse: capsules pubescent along the angles. 12. C. cinerascens. 
Involucres inconspicuous, less than 1 mm. high ; appendages obsolete. — 13. C. deltoidea. 
Involucres corolla-like, over 1 mm. high ; appetdayes petal-like. . M. C. albomarginata. 
&. Perennials 
Foliage glabrous. 15. C. Fendleri. 
Bir ee lo at the h h obsol d ul 
8 Simple at the base: gl wi ete appendages: ca es 
less than 1mm. high. dene pee i 16. C. adicioides. 
