500 ORDER CIX. TJRTICACE.E. 



Genus IX.— PHYLLANTHUS. L. 19—15. 

 (From the Greek phullon, a leaf, and anthos, a flower.) 



Monoecious. Sterile florets ; perianth 5 — 6-parted, filaments 

 6, united. Fertile florets ; perianth 5 — 6-parted, paracorolla 

 a 12-angled margin. Styles 3. Capsule 3-celled, 3-seeded. 



1. P. Carolinen'sis, (Walt.) Stem erect, with alternate branches, 

 glabrous. Leaves alternate, oval, obtuse, smooth, distichous. Flowers 

 axillary, nodding, fertile and sterile intermingled. Perianth colored at 

 the base. — 0. Sept. — Oct. Damp soils. 10 — 12 inches. 



Genus X— PACHYSAN'DRA. Mich. 19—4. 

 (From the Greek paclms, thick, and andros, a stamen.) 



Perianth 4-leaved. Stamens 4. Filaments sub-clavate 

 Styles 3. Capsule 3-horned, 3-celled, cells 2-seeded. 



1. P. procum'bens, (Mich.) Stem procumbent and simple. Leaves 

 alternate, pubescent, crenate, toothed, oval. Flowers in spikes, nearly- 

 radical, the lower ones fertile, the upper ones sterile, all bracteate. JFV 

 rianth minute, ciliate. Capsule finely pubescent. — 2/.. June. Mountains. 



Genus XL— BO'RYA. Willd. 20—2. 

 (In honor of Bory de St Vincent.) 



Dioecious. Sterile florets ; perianth 4-leaved. Stamens 2 

 — 3. Fertile florets ; perianth 4-leaved, unequal. Stigma cap- 

 itate. Fruit 1 -seeded. 



1. B. porulo'sa, (Mich.) Somewhat shrubby, rarely spiny. Leaves 

 coriaceous, opposite, oblong-lanceolate, sessile, dotted underneath, and 

 ferruginous, margins revolute. 



Order CIX.— URTICA'CE^E. (Nettle Family.) 



Flowers monoecious or dioecious, scattered or clustered. Peri 

 anth membranaceous, lobed, persistent. Stamens definite, 4 — 5, 

 inserted into the base of the perianth and opposite its lobes. 

 Ovary superior, simple. Ovule solitary, erect. Stigma simple. 

 Fruit an indehiscent nut, surrounded by the perianth. Usually- 

 herbaceous plants, with alternate leaves, often covered with 

 stings. 



Genus I— UR'TICA. Tourn. 19—4. 

 (From uro, to burn, from Its stinging.) 



Flowers usually monoecious. Sterile florets ; perianth of 4 

 leaves. Stamens 4. Fertile florets ; perianth 2-leaved. Stig- 

 ma 1. Seed 1, shining. 



1. U. pu'mila, (L.) Stem usually erect, succulent. Leaves opposite, 

 decussate, ovate, acuminate, serrate, 3-nerved, lower ones on rather 



