^scDLUS. IIIPPOCASTANACE^. 251 



palmatcly 5-7-fuliolatc : leaflets simply pinnatoly veined. Flowers in tenni- 

 nal tbyrsoid racemes or panicles. — Horse-Chestnut. Biu:kcyc. 



§ 1. Fruit echinate. — iEscuLus, DC. 



1. JE. srhibra ( Willd.) : stamens nearly twice the length of the (yellow- 

 ish-white) corolla ; petals 4, spreading, a little unegual ; the claws scarcely 

 the length of the canipanulate calyx; thyrsus racemose, loosely-flowered; 

 I^^af^ets 5, oval or oblong, acuminate, finely and unequally serrate, glabrous. — 



iVilld.. p}ium. p. 405; Pursh^ fl. I. p. 255; DC. prodr. \. p. 597. M. pal- 

 lida, Willd. I. c. df-c. /E. cchinata, Muhl. cat. p. 38. M. Ohioensis, DC. I 

 c. ; Ifiddi-ll, .•??/Hop.s/.9, ;j. 34. Pavia Ohioensis, Mich.r. f. sylv. 2. p. 101, t 

 29. P. pallida & glabra, Spark, in ann. sci. nat. (ser. 2.) 2. p. 54. 



Banks of rivers, &c. Western parts of Pennsylvania! and Virgmia: 

 Ohio ! Kentucky ! May-June. — A small tree with a rough bark, M'hich ex- 

 liales an unpleasant odor. Leaflets somewhat acute at the base, at first ses- 

 sile, at length more or less petiolulate, slightly pubescent along the veins 

 when young, usually a little bearded in the axils of the veins beneath. 

 Branches of the thyrsus short, 4-6-ilowered ; the flowers mostly unilateral, 

 small (not half the size of those of the common Ilorse-Chestnut). Petals 

 nearly equal in length, the hmb of the lateral ones roundish ; of the superior 

 ones oblong-spatulate, about twice as long as the claw. Stamens 7: fila- 

 ments curved. Fruit prickly, resembling that of the cultivated Horse-Chest- 

 nut (iE. Hippocastanum), but scarcely half the size. — Ohio Buckeye. Fetid 

 Bv^keye. 



§ 2. Fruit unarmed. — Pavia, DC. 



2. JE. parvijlora (Walt.): stamens capillary, thrice the length of the 

 (white) corolla ; petals 4, somewhat spreading, nearly similar, spalulate ; the 

 claws longer than the obconical calyx; thyrsus racemose, very long, the 

 branches about 3-flowercd ; leaflets 5-7, oval-obovate, acuminate, serrulate, 

 velvety -canescent beneath. — IValt. Car. p. 128. M. macrostachya, Michx, 



f. 1. p. 220 ; Jacq. eclog. Am. l.t.9; Ell. sk. 1. p. 436 ; Bot. mag. t. 2118. 

 M. macrostachvs. Pe?\s. .^yn. 1. p. 403. Pavia macrostachya, DC. prodr. 

 1. p. 598. P. aiba, Pair. diet. 5. p. 95. P. edulis, Poit. arb. fr. t. 88. Ma- 

 crothyrsus discolor, Spach. I. c. ]). 61. 



Near rivulets in the western part of S. Carolina! and Georgia! April- 

 May. — A small shrub, 2-4 feet high, sometimes with radical stolons. Leaf- 

 lets petiolulate. Flowers very numerous, in a long somewhat virgate thyr- 

 sus. Petals small, with long claws, spatulate ; the upper ones longest and a 

 little narrower. Stamens 6-7 : filaments capillary, glabrous, slightly curved- 

 — The fruit is said to be edible. 



3. jE. Californica (Nutt. ! mss.) : " stamens longer than the (rose-color) 

 corolla; petals 4 [4-5, .S'y-»r/c/i], somewhat similar, slightly spreading ; th» 

 claws shorter than the campanulate-tubular somewhat unequally-toothed ca 

 lyx; thyrsus short and dense ; leaflets 5, ovate-lanceolate or ellipticak.blong, 

 acuminate, subcordate or rounded at the base, serrulate, glabrous, paler and 

 somewhat glaucous beneath." — Calothyrsus Californica, SpacJi, in ann. sci. 

 nat. (ser. 2.) p. 62. 



California, Botta (ex Spach) : near streams in the vicinity of Monterey, 

 Nuttall! March. — A low spreading tree, glabrous except the petioles of the 

 leaflets and calyx, which are minutely canescent. Calyx wiJ,h 5 small some- 

 Avha'i unequ;d teeth, at length splitting down on the loAver side. Stamens 

 5-6 : filaments arcuate, glabrous. Ovary globose-ovate, pubescent, not echi- 

 nate. — The flowers are apparently a little smaller than those of the preceding 

 species. 



