Part 4, 1908] ROSACEAE 385 
above, 1-2 cm. long; inflorescence small, glomerules usually at or near the ends of the 
branches; hypanthium urn-shaped, glabrous, in fruit almost globose, 1-1.5 mm. long ; 
bractlets lanceolate, glabrous, about 0.5 mm. long, equaling the ovate sepals; pistils 
usually 2; achenes brownish, dotted. 
Type collected in the valley of Mexico at Santa Fé, 1866, Bourgeau 308 (U.S. Nat. Herb.). 
14, Lachemilla ocreata (Donn. Smith) Rydberg. 
Alchemilla ocreata Donn. Smith, Bot. Gaz. 23: 7. 1897. 
Cespitose perennial ; stems decumbent, yellowish-sericeous; stipules and the reduced 
leaves forming amplexicaul sheath, strongly imbricate, divided into 6-8 lanceolate lobes, 
4 mm. long, with revolute margins; flowers in terminal clusters; hypanthium campanulate, 
1.5mm. long; bractlets 4 or 5, lanceolate, acute, about equaling the ovate sepals; stamens 2, 
rarely 3, opposite the sepals; pistils about 8, stipitate. 
TYPE LOCALITY: Thickets at General, Comarca de Punta Arenas, Costa Rica. 
DISTRIBUTION : Known only from the type locality. 
33. ZYGALCHEMILLA Rydberg, gen. nov. 
Perennial herbs, more or less sarmentose-stoloniferous. Basal leaves pinnatifid with 
humerous 2-3-cleft leaflets and with scarious brown stipules; stipules of the more reduced 
stem-leaves connate and adnate to the petioles. Flowers solitary in the axils of the small 
leaves of the inflorescence. Hypanthium obconic-urceolate, slightly if at all contracted at the 
mouth. Sepals and bractlets 4, lanceolate, 3-nerved. Petals none. Stamens 2, opposite 
two of the sepals; filaments slender, nearly equaling the sepals; anthers extrorse. Disk 
poorly developed. Pistils 1 or 2, conspicuously stipitate; styles basal, slender; stigmas 
capitate. 
Type species, Alchemilla pinnata R. & P. 
1. Zygalchemilla pinnata (R. & P.) Rydberg. 
. Alchemilla pinnata R. & P. Fl. Per. 1: 69. 1798. 
Aphanes pinnata Pers. Syn: Pl. 1: 150. 1805. 
Aphanes alata Steud. Nom. Bot. 58. 1821. 
Alchemilla pinnaia Renny, Ann. Sci., Nat. III. 6: 354. 1846. 
Alchemilla achilleaefolia Renny, Ann. Sci. Nat. ITI. 8: 224. 1847, 
Sarmentose-stoloniferous perennial, rooting at the nodes; stem hirsute; basal leaves 
pinnatifid with numerous segments; stipules brown, scarious, ciliate, lanceolate, entire ; 
leaflets deeply 3-cleft into lanceolate or oblong divisions, hirsute, 3-5 mm. long; stipules 
of the stem-leaves foliaceous, connate, dissected into linear divisions; blades sessile with 
few segments; flowers solitary in the axils of the upper leaves, short-pedicelled ; hy- 
panthium campanulate, only slightly constricted at the mouth, about 2 mm. long; bract- 
lets and sepals lanceolate, 3-nerved, strigose without, about 1 mm. long; filaments nearly 
equaling the sepals; pistils 1-2, stipitate. 
TYPE LOCALITY: Huassahuassi, Peru. . — 
DISTRIBUTION : Mountains from central Mexico to Bolivia. 
Tribe 9. SANGUISORBEAE. Perennial or annual herbs, with alternate, 
usually odd-pinnate leaves and foliaceous stipules. Inflorescence racemose or 
spicate; flowers perfect or unisexual. Hypanthium urceolate, campanulate, 
or turbinate, more or less constricted at the mouth, in fruit enclosing the 
achenes and more or less indurate. Disk usually well developed, bearing one 
to many stamens. Bractlets sometimes present, but lacking in all our genera. 
Petals 4 or 5, or wanting; in the latter case, the sepals usually colored and 
petal-like. Pistils usually 1 or 2, rarely 3-5; styles terminal, persistent ; 
stigmas capitate or brush-like. 
