RUTACEZ. 501 
coriaceous, articulate at base ; flowers‘ axillary cymose, usually few 
(Trop. and Subtrop. America’). 
92? Holacantha A. Gray.’—“‘ Flowers by abortion diccious ; 
male receptacle subcupuliform. Calyx short, 5-8-partite, imbricated. 
Petals 5-8 oblong, imbricated, deciduous. Stamens 10-16, inserted 
without below crenate disk; filaments rather thick villous (subulate 
in female flower); anthers introrse ovate 2-rimose (effete in female 
flower). Germen (in male flower rudimentary depressed conical) 
placed on disk. Carpels 5-8 free; germens 1-locular tapering in 
terminal styles subcoalescing at base, afterwards subulate and in- 
wardly stigmatiferous divergent; ovule in each germen solitary 
inserted on internal wall incompletely anatropous ; micropyle extrorse 
superior. Drupes (?) 4-6, patent separating from short-rigid 4—6-fid 
receptacle; exocarp thin; putamen crustaceous; seeds ovate; testa 
thin ; albumen fleshy scanty ; embryo straight, radicle short superior ; 
cotyledons flat ovate—An aphyllous orgyalis shrub; branches 
ascending ; twigs changing into strong spines, flowers small glome- 
rate on spinescent branches’ (NV. Mewico’). 
93. Ailantus Desr—Flowers polygamous; calyx short, 5-fid, 
imbricated. Petals 5, longer, induplicate valvate, patent ;7 receptacle 
dilated beyond perianth in 10-lobed disk (in male flower depressed, 
in female large elevated subhemispherical). Stamens 10, 2-seriate, 
inserted at base of disk (in female flower all or partly sterile, some- 
times 5-7, or all wanting) ; filaments free; anthers 2-locular ; cells 
at margin or subextrorsely rimose.* Carpels 2-5, oppositipetalous 
(rudimentary or 0 in male flower) seated at summit of disk ;° germens 
1 Small, red, or virescent, 
2 Spec. 5, 6. Hoox., Bot. Misc., i. 271, t. 
56.—GrisEB., Fl. Brit, W.-Ind., 140.—LIEBM., 
in Vidensk. Medd, (1853), 108 (part.).—TR., in 
Ann. Se, Nat., sér, 5, xv. 8359.— WaALP., Ann., i. 
164; vii. 539, 
3 Pl. Thurber., in Mem. Amer, Acad., sér. 
nov., v. 310.—B. H., Gen., 310, n. 10. 
4 A doubtful genus almost unknown to us, 
enumerated after Castela among the Simaru- 
bacee, (B. H.), with aspect of Keberlinia, 
from description of figure allied to Astrophyllum, 
with aphyllous branches and apparently eglan- 
dular, 
5 Spec. 1. H. Emoryi A.GRay, luc.cit.—Torr., 
in Emor, Rep., Bot., t. 8.—WAtLpP., Ann., vi. 419. 
6 In Act. Ac, Par. (1786), 263, t. 8.—DC., 
Prodr., ii. 88.—K., in Ann. Se. Nat., sér. 1, ii. 
358.—A. Juss., in Mém. Mus., xii. 511. — 
Spacn, Suit. à Buffon, ii. 370.—ENDL., Gen. 
n. 5980. — PAYER, Organog., 110, t. 24. — 
B. H., Gen., 309, 992, n. 6. 
7 In A. glandulosa Desr. the petals are in- 
duplicate, valvate, slightly imbricated at apex, 
at base within concave and pilose. 
8 A. glandulosa, inserted at apex of filament 
outwardly at middle of connective. 
% A disk correctly said to be double; exterior 
outwardly 10-lobed, prominent between petals 
and stamens; inferior lobes alternating with 
exterior, surrounding base of carpels in female 
flowers. 
