BUT AGE 2E. 



501 



coriaceous, articulate at base ; flowers ' axillary cymose, usually few 

 (Trqp. and Subtrop. America 2 ). 



92 ? Holacantha A. Gray. 3 — " Flowers by abortion dioecious ; 

 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). Grermen (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. — A n aphyllous orgyalis shrub ; branches 

 ascending ; twigs changing into strong spines, flowers small glome- 

 rate on spinescent branches" 4 {N. Mexico"). 



93. Ailantus Desf. 6 — 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. 8 Carpels 2-5, oppositipetalous 

 (rudimentary or in male flower) seated at summit of disk ; 9 germens 



1 Small, red, or virescent. 



2 Spec. 5, 6. Hook., Bot. Misc., i. 271, t. 

 56. — Geiseb., El. Brit. W.-Ind., 140. — Liebm., 

 in Vidensk. Medd. (1853), 108 (part.). — Te., in 

 Ann. Sc. Nat., ser. 5, xv. 359. — Walp., Ann., i. 

 164; vii. 539. 



3 PI. Thurber., in Mem. Amer. Acad., ser. 

 nov., v. 310.— B. H., Gen., 310, n. 10. 



4 A doubtful genus almost unknown to ns, 

 enumerated after Castela among the Simaru- 

 bacece. (13. 11.), with aspect of Kceberlinia, 

 from description of figure allied to Astrophgllum, 

 with aphyllous branches and apparently eglan- 

 dular. 



5 Spec. 1. H. Emoryik.GB.kY, luc.cit. — Toee., 

 in Emor. Rep., Bot., t. 8. — Walp., Ann., vi. 419. 



6 In Act. Ac. Bar. (1786), 263, t. 8.— DC, 

 Brodr., ii. 88. — K., in Ann. Sc. Nat., ser. 1, ii. 

 358. — A. J0SS., in Mem. Mus., xii. 511. — 

 Spach, Suit, d Buffon, ii. 370.— Endl., Gen., 

 n. 5980. — Payee, Organog., 110, t. 24. — 

 B. H., Gen., 309, 992, n. 6. 



7 In A. glandulosa Desf. 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. 



9 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. 



