414 NATURAL HISTORY OF PLANTS. 
very short; anthers muticous or shortly apiculate. Hypogynous 
glands 4, free, often contiguous.! Germen sessile; ovules 2, ortho- 
tropous or suborthotropous collaterally ascending ; micropyle inferior 
style erect; apex clavate stigmatiferous. Follicle woody-coriaceous 
compressed smooth, l-locular. Seeds 2, much compressed oblong ; 
completely surrounded by their membranous wing; embryo central ; 
radicle inferior.—Trees or shrubs ; leaves opposite, sometimes simple 
(rarely entire), sometimes imparipinnate; flowers in axillary or 
terminal, solitary or axillary racemes ; pedicels paired in axil of each 
bract, free or semiconnate (Central and Cis-andine South America’). 
18. Andripetalum Scnorr.—Flowers regular, hermaphrodite ; 
perianth-leaves finally revolute deciduous. Stamens 4. Hypogynous 
scales 4, free or connate into a 4-toothed urceolus. Germen subses- 
sile; ovules 2, descending suborthotropous ;* style slender, slightly 
thickened at apex. Drupe nearly juiceless, 1-seeded indehiscent. 
Seed exalbuminous ; embryo fleshy ; radicle inferior.—Trees ; leaves 
alternate or opposite, simple; floral racemes terminal or axillary, 
simple or more rarely slightly branched (Zropical America,’ Australia’). 
' 19. Guevina Mo1.’—Flowers slightly irregular, hermaphrodite. 
Perianth inserted obliquely, deciduous ; leaves antheriferous at con- 
cave dilated apex, dissimilar; 1 erect, 3 revolute. Stamens 4, 
shortly apiculate. Hypogynous glands 2, anterior. Germen sub- 
sessile; ovules 2, orthotropous collaterally descending; style erect 
1 Trigonous pollen-grains witb papillose angles 
occur in &. serrata, heterophylla, rhombi- 
Jfolia. (H. Mout., in Ann. Se. Nat., sér. 2, iii. 
314.) 
? Species about 35, of which 1 is Mexican. 
R. & Pav., Fl. Per., t. 98, 99 (Embothrium).— 
H. B. K., Nov. Gen. et Spec., ii. 152, t. 118- 
120.—Pout., Pl. Bras., i. 106, t. 86, 88, 90.— 
‘Parr. & Enpu., Nov. Gen. et Spec., ii. 35, 
t. 149.—Kt., in Linnea, xv. 54; xx. 4738; in 
Hook. Jouwrn., iv. 326.—Moric., Pl. Now. 
Amér., 172, t 100.— Metssn., in Mart. Fl. 
Bras., Prot.; 79, t. 31-83. One New Caledonian 
species is described, R. Vietllardii Br. & Gr., 
in Ann. Sc. Nat., sér. 5, i. 345. But the genus 
of the plant, whose fruit is yet unknown, remains 
very doubtful. 
3 Ex ENDL., Gen. n. 2149; Suppl., iv. p. ii. 
82.— Mrtssn., Prodr., 345, 698.— Andria- 
petalum Pout., Pl. Bras., i. 114, t. 91, 92.— 
? Panopsis Satiss, (ex. MzIssn.). 
4 Whereby this genus is especially distin- 
guished from Helicia. 
5 Species 8-10. H. B. K., Nov. Gen. et 
Spec. ii. 154, t. 121 (Rhopala).—A. Ricu., in 
Mém. Soc. Hist. Nat. Par., i. 106 (Roupala).— 
Ku., in Linnea, xv. 53; xx. 471.—Meissn., in 
Mart. Fl. Bras., Prot., 77. 
5 Several species hitherto described under He- 
licia, among which will come the Macadamias 
(F. Mvexz., in Trans, Phil. Inst. Viet., ii. 72; 
Fragm., vi. 191, under Helicia); Fl. Aust., v. 
406.—See H. Byn., in Adansonia, ix. 258. 
7 Chil, 198; ed. 2, 279.—J., Gen. 424.— 
R. Br., in Trans. Linn. Soe, x. 48, 165.— 
Escuscu., in Mém. Acad. Pétersb., x. 281.— 
Enpvu., Gen., n. 2140.—Mutssy., Prodr., 347, 
698.—Nebu Frvitn, Chil. iii. 46, t. 33.— 
Quadria R. & Pav., Prodr., 16; Fl. Per, et 
Chil, i. 68, t. 99, fig. b—Garon. F., Fruct., iii. 
220, t. 220.—Avellana Gmrtn, B., loc. cit. 
