434 
JABOROSA 
Jaborosa Juss. Solanaceae (n. 5). 8 sp. Mexico, temp. S. Am. 
Jacaranda Juss. Bignoniaceae (11). 30 sp. trop. Am. 
Jacksonia R. Br. Leguminosae (in. 2). 37 sp. Austr. 
Jacobinia Moric. Acanthaceae (iv. B). 20 sp. trop. Am. 
Jacquemontia Choisy. Convolvulaceae (1. 4). 40 sp. trop. Am., Afr., 
Sandw. Is. 
Jacquinia Linn. Myrsinaceae (1). 6 sp. trop. Am. 
Jambosa DC. = Eugenia Mich. 
Jasione Linn. Campanulaceae (1. 1). 5 sp. Medit., Eur. J. montana 
L., the sheep’s-bit scabious, is common in Brit., especially in hilly 
districts. The fir. is of interest as affording — like Phyteuma, but in a 
slightly different way — an intermediate step between Campanula and 
the Compositae, in the floral mechanism. The tube is formed by the 
anthers, which cohere at their base, while the petals spread out as 
soon as the bud opens. 
Jasminaceae (Warming) =01eaceae (suborder II.). 
Jasminum (Tourn.) Linn. Oleaceae (11). 160 sp. trop. and sub-trop. 
Erect or twining shrubs, often cultivated for their sweet scented firs. 
(Jasmine). The fruit is vertically constricted into two lobes. 
Jasonia Cass. Compositae (iv). 2 sp. Medit. 
Jateorhiza Miers. Menispermaceae. 2 sp. trop. Afr. J. Columba 
Miers {J. palmata Miers) furnishes Radix Columba, used as a tonic. 
Jatropha Linn. Euphorbiaceae (A. 11. 3). 70 sp. trop. and sub-trop. 
y. podagrica Hook., frequently cultivated, is a xerophyte with egg- 
shaped swollen stem, consisting mainly of water-storing tissue; the 
leaves fall in the dry season (p. 168). The axis of the infl. is red, as 
well as the firs. The first branches of the dichasium end in ? the 
later in <? firs. (cf. Begonia). 
Jatrorrhiza Prantl= Jateorhiza Miers. 
Jeffersonia Bart. Berberidaceae. 2 sp. N. Am., E. As. 
Juanulloa Ruiz et Pav. Solanaceae (iv. 7). 10 sp. trop. Am. J. 
parasitica R. et P. is not a parasite, but an epiphyte. 
Jubaea H. B. et K. Palmae (v. 7). 1 sp. Chili, J, speciabilis H. B. 
et K., the Coquito-palm. Palin-honey is prepared by evaporation of 
the sap, and the tree is useful in other ways. 
Juglandaceae. Dicotyledons (Archichl. Juglandales). 6 gen. with 40 
sp., N. temp., and trop. As. Trees with alt. stip. leaves, with brown 
hairy winter buds : the buds arise rather high up in the leaf axils, and 
sometimes several appear in descending order. Infl. monoecious, the 
<? appearing as catkins on the twigs of the previous year, the ? as 
sessile firs, on the stems of the current year. Perianth typically 4- 
leaved, but often fewer by abortion. <? fir. with 3 — 40 sta. (more in 
the lower firs.) ; ? fir. with epigynous perianth, and 2 cpls. Ovary 
syncarpous, i-loc.,with 1 erect orthotropous ovule ; style short with 2 
stigmas. Fir. wind-fertilised; Juglans (q. v.) is chalazogamic. Fruit 
a drupe or nut. Testa thin; seed exalbuminous. Chief genera: 
