3 Divisions -{ 2. Monopetalae. 

 _ 3. Polypetalse. 



EXOGENS. 49 



Swamps, S. Oar., S. 2. Calathea (stigma cup-shaped). Stem con- 

 tracted ; Ivs. large, often variegated ; fls. bracteate in terminal lids, or 

 spikes. Trop. Am. C. zebrlna, Zbbra-Leaf. Lvs. with alt. dark- 

 colored and green stripes. Fls. in heads. Several other fine species. 

 Trop. Am. 3. Mardnta. Tubers fleshy, furnishing Arrow-root. 

 Tropics, both worlds. Lvs. large. Fls. in panicles ; bracts deciduous. 

 Several species. M. Alloupa, M. nobilis, M. arundindcea, W. Ind. ; 

 M. ramosissima, E. Ind. 4. Thalia. Lvs. stalked, with a powdery 

 bloom like that of a plum. Fls. bracteate, in stalked panicles. Fr. a 

 1-seeded utr.cular capsule. Emb. hooked. Stemless herbs from fibrous 

 rts. S. States, trop. Am. T. dealbdta, lvs. distichous, long-petioled, 

 cordate-ovate. Scape reed-like, with a spioate panicle of purple fls. 

 Hardy ; and very interesting on account of the lovely stellate cells 

 composing horizontal partitions in air-canals of the leaf-stalk. Ponds 

 and marshes, S. Car., Gulf States to Mex., thence to trop. Am. 



SiTB-ClASS II. — BXOGENS (DiCOTTLilDONS). 



Division I. — Apetalm. 2 Subdivisions-! 2' Ovarvfree" 



Flowers aohlamydeous, or monoehlamydeous ; rarely dichlamydeous. 



Subdivision I. — Ovary adherent when a perianth is present. Perianth 

 more or less distinct. 



Sandalwood Alliance (allied also to Olax). 



Ovules usually reduced to a naked nucleus. Disk often apparent. 

 Plants usually parasitic. 1. Balanophoracese. 2. Santalacese 

 (sometimes dichlamydeous). 3. Loranthaceae. 



Ord. 1. Balanophoraceae.— Fls. ^, $ Ji, rarely ? §(?,§; 

 nionochlamyd. ; infl. spicate on a scape. Sta. 8-1- 00; free or mon- 

 adelphous ; anth. 1-2- 00-celled. Ova. adh., 1- rarely 2-celled; ov. sol. 

 Fruit dry. Emb. minute, undivided. Herbs, fleshy, leafless, rhizo- 

 mous, parasitic on roots of other plants. Intertropical, both worlds. 

 14 genera. 



1. Ombrophytum, Mottntain Matzk ; springing up like Mush- 

 room, after rain; edible. Peru. 2. Balanophora elongdta, waxy; 

 used for candles, Java. 3. Cynomdrium eoecinea, Malta Mush- 

 room ; edible. Mediterranean shores and islands. 



Ord. 8 Santalacese. Sandalwoods. — Fls. SJ , ? § J> or ? (J ; 

 monochlamyd., inconspicuous; infl. various. Perianth 5-4-3-lobed, 

 isostemonous. Ova. adh. Ov. 2-3-5, pend., naked (without seed- 

 coats) embryo-sac protruding from the nucleus, developing the embryo 

 and perisperm outside the nucleus. Fi. a nut, rarely a berry. Sd. sol. ; 

 perisperra fleshy. Herbs, Shrubs, or Trees,- often parasitic. Lvs. 

 entire, exstip. 20 genera ; 3 Tribes : 



Tribe 1. — Fls. 9 (f, 4-merous ; 9 dichlamyd, sol. ; (^ clustered. 

 Fr. a 1-seeded drupe. Buckleya distichophglla, only gen. and spec. 

 Small tree or shrub ; lvs. ovate-acuminate, fls. small. Mts. E. Tenn. 



4 



