458 NATURAL HISTORY OF PLANTS. 
membranous, dehiscing by ventral sutures. Scanty seeds and other 
characters of Rufa.—Perennial glandular-punctuate fragrant herbs ; 
stems and branches slender terete; leaves alternate, 2-pinnate ; 
folioles entire; flowers' in terminal compound-cymiferous racemes ; 
cymes more or less regular, sometimes 1-parous at apex; bracts 
small foliaceous entire? (Northern India, Japan’). 
3. Thamnosma Torr. & Frem.'— Flowers 4-merous; sepals 
short. Petals sessile entire, in false campanulate or tubular corolla, 
connivent free, imbricated. Disk thin, annular or cupuliform, cre- 
nate or lobed. Stamens 8, 2-seriate, inserted at base of disk; fila- 
ments filiform ; anthers short apiculate, introrsely 2-rimose. Germen 
long or shortly (Rutosma’) stipitate, 2-dymous, 2-locular (carpels 
ventrally long connate) ; style slender erect, stigmatiferous capitellate 
at apex; ovules in each cell 4-8, 2-seriate. Capsule coriaceous 
punctuate, 2-dymous; cells 2, inwardly dehiscing. Seeds few, sub- 
reniform, smooth or muricate (Æufosma) ; testa crustaceous ; albumen 
fleshy ; embryo curved.—Shrubs or herbs frutescent at base glan- 
dular-punctuate graveolens; leaves alternate entire simple, some- 
times very scanty or almost wanting; flowers’ ramified racemose at 
apex of branchlets (California, Texas’). 
A, Tetradriclis Srrv..—Flowers 4-merous; receptacle depressed 
convex. Sepals small and petals longer, very shortly unguiculate 
persistent. Stamens 4, inserted with perianth; filaments thin sub- 
ulate; anthers subglobose, 2-rimose. Carpels 4; germen |-locular ; 
style central gynobasic erect inserted between germens ; apex 4- 
agonal angular stigmatiferous ; ovules in each germen 2-6, obliquely 
inserted at interval angle. Capsule depressed-4-gonal; cells 2- 
spermous, loculicidal at angles ; exocarp membranous separating from 
crustaceous endocarp. Seeds oblong; testa thin smooth; embryo 
rather short curved.—Fleshy glabrous many-stemmed herbs; leaves 

1 Small, white. 5 À. Gray, Gen, IU., 143, t. 155. 
? A genus much better made a section of 5 Small or large, yellow, the same by some 
Ruta. referred to Haplophyllum. 
3 Spec. 1. B. albiflora Retcus., Loc. cit. — 7 Spec. 2. Watpr., Ann., vii. 510. 
Watp., Rep., i. 517.—Rula albiflora Hoox., 8 In Bieb. Fl. Taur.-Caucas., iii. 277, 648.— 
Exot, F1.,t. 89. C. A. Mry., Verz. Cauc.-Casp. Pfl., 226.— 
In Frem. Sec. Rep., 313; in Whippl. Rep, Enpu., Gen., n. 6029.—B. H., Gen., 288, 
‘17, t.3.—B. H., Gen., 288, n. 15. n, 14.—Anatropa EHXRENB., in Linnea, iv. 402. 
