EOSACEJB. 379 



ing anatropous ovules, whose micropyles look downwards and out- 

 wards.' Tlie number of ovules in each row may be reduced to one 

 or two. The fruit consists of five follicles, surrounded by the mem- 

 branous receptacle ; each contains one or more seeds, with thick 

 coats inclosing a fleshy embryo with its radicle inferior, surrounded 

 by a thin layer of albumen. The only two known species of Gillenia 

 are perennial herbs from North America." From the subterranean 

 rhizome arise each year the aerial branches covered with alternate 

 trifoliolate leaves, whose stipules are ill-developed in the one species,^ 

 and very large .in the other.^ Their flowers are in terminal clusters 

 of few-flowered cymes. 



Neillid' also comes very near Spiraa in some of its species, though 

 it is very easy to distinguish and characterize the prototype of the 

 genus, N. tJii/rsifora.^ Here the receptacle forms a long tube, in 

 whose throat is inserted a calyx of five sepals, imbricated when 

 young, and a corolla of as many little alternating petals, also origi- 

 nally imbricated. The stamens, of which there are twenty or 

 upwards, are arranged in whorls as in Spir^Ba ; each stamen has a 

 short filament inflexed in the bud, and an introrse anther. The 

 gynseceum consists of two free carpels, or more usually of a single 

 one inserted in the bottom of the receptacle. These carpels resemble 

 those of most species of SpircBa, and the ovary contains a variable 

 number of ovules inserted in two rows upon the internal angle.' 

 The fruit consists of one or two follicles,^ and the seeds contain in 

 their coats a fleshy embryo, surrounded by an equally fleshy albu- 

 men. To NeilU.a proper botanists have added certain plants formerly 

 held to constitute the section Phpocarjmi of Spiraa, the best known 

 of which is 8. opidifoUa?'^ In its flowers the receptacular tube is 

 shorter and more everted than in S. thj/rsiftora, with sometimes only 



' There may be as many as four or six in each ^ Don., Prodr. Fl. Nepal., 228. — DC, 



row. They have two coats. Prodr., ii. 546. — Endl., Gen., n. 4614'. — Hook. 



2 Tore. & Ge., Fl. N. Amer., i. 418. — A. F. & Tiioms., Journ. Linn. Soc, ii. 75. — B. H., 



Geay, Man. of Sot., ed. v. 150. — Chapm., Fl. Gen., 612, n. \d.—Adenilema Bl., Bijdr., 1121. 



S. Unit.-States, 121. —Endl., Gen., n. 4666. 



'^ G. trifoliata McENCH, loc. cit. — DC, ^ Don., loc. cit.— DC, Prodr., 547, n. 1. 



Prodr., n. 1. ^ As in Gillenia, they possess two coats. 



■• G. stipulata. — G. stipulacea Nutt., loc. ^ They are surrounded by the persistent caly.\, 



cit. — DC, Prodr., n. 2. — Spircea slipulala covered with glandular hairs. 



MuEHL., ex W., Fnmn., i. 542. — PoiR., Diet., ^ Cambess., op. cit., 385. 



Suppl., V. 221.— Cambess., op. cit., 388, n. 34, i" L., Spec, 702.— DC, Prodr., ii. 542, n. 1. 



t. 28. — .S'. trifoliata var. incisa PURSii., Fl.Am. — SPACn, Stdt. a Bttffou, i. 431. 

 6'ep/., ed.2,i. 343. 



