500 



ORDER CIX. URTTCACE.E. 



Genus IX.— PHYLLANTHUS. L. 19—15. 

 (From the Greek phullon, a leaf, and antlws, 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. — %-. Sept. — 'Oct. Damp soils. 10 — 12 inches. 



Genus X.— PACHYSAN'DRA. Mich. 19—4. 

 (From the Greek pachus, 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. Pe- 

 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 re volute. 



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.) Stern usually erect, succulent. Leaves opposite, 

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



