34 FAM. 30, 31. 



basal leaves; flowers polygamous, the upper ones in each branch of the pan- 

 icle fertile. Open woods. Summer and Fall. 

 7. Perianth greenish-yellow, turning brown; sepals and petals with two 



glands at the base; seeds flat, winged, - Melanthium 



M. Virginicum. Caulescent herbs with linear, pubscent leaves on the stem, 

 mainly below the middle; flowers in a narrow panicle. In grassy, swampy 

 places. Summer. 



30. Juncaceae, Rush Family. 



Grass-like herbs with a regular, 6-parted, chaffy peri- 

 anth; stamens 3 or 6; ovary superior, style 1, stigmas 3; 

 fruit a capsule. 



Glabrous herbs; leaves terete or flat; sheaths open; flower-bracts 



1 or 2, usually entire, __-__- Juncus, Rush 



1. Inflorescence lateral, - -________2 



1. Inflorescence terminal, --------__4 



2. Flowers not in heads on the branches of the inflorescence, - 3 



2. Flowers in heads on the branches of the inflorescence; — scape stout, 



rigid; flowers usually dioecious, heads 2-8 flowered in a compound 

 panicle; stamens 6 or reduced to staminodia. Salt marshes. 

 Late Spring, ------ J. Roemerianus (maritimus) 



3. Stamens 3; — scape straight, not rigid; leaves basal, filiform, small; 



panicle decompound. Bogs. Summer and Fall, - - J. effusus 



3. Stamens 6; — scape weak, slender; plants densely tufted; panicle small. 



Coastal marshes. Summer, - - - - - - J. setaceous 



4. Flowers not in heads on the branches of the inflorescence; stamens 6. 



J. tenuis. Stems wiry; leaves flat-filiform; panicle loose. Low ground. Early 

 Summer. 



J. dichotomus. Stems wiry; leaves round-filiform, channelled; panicle forked 

 or dense. Low ground. Early Summer. 



J. bufonius. Stems slender, flower-bearing nearly the whole length, flowers 

 remote. Roadsides. Spring and early Summer. 

 4. Flowers in heads on the branches of the inflorescence; stamens 3. 



J. scirpoides. Stems rigid; leaves terete, with complete septa; heads 2-30 flow- 

 ered, style usually exserted. Hammocks and sandy swamps. Summer. 



J. polycephalus. Stems stout; leaves flattened with incomplete septa; heads 20- 

 100 flowered, distant. Banks of streams. Summer. 



J. Elliottii. Stems, leaves, and panicles erect; heads 3-8 flowered. Bogs and 

 ditches. Summer and Fall. 



31. Alliaceae, Onion Family. 



Acaulescent herbs with bulbs; leaves basal, narrow; 

 scapes simple; flowers perfect in terminal umbels, sub- 

 tended by 1-3 membranous bracts; perianth 6-parted; 

 stamens 6, adnate to the perianth; ovary superior, 3-celled; 

 style jointed. 



1. Wild plants, 2 



1. Cultivated, ___________-3 



2. Ovules 2 in each cavity; plants odorous, ------ Allium 



