GENUS I. 



ARUM FAMILY. 



443 



3. Arisaema Stewardsonii Britton. 

 Stewardson Brown's Indian Tur- 

 nip. Fig. 1113. 



Arisaema Stezi'ardsonii Britton, Man. Ed. 2, 1057. 

 1905. 



Leaves 2, or i in the case of small plants, 

 i-2i high, 3-foliolate, the segments lanceo- 

 late to ovate-lanceolate, erose-crenulate, shin- 

 ing, acuminate at the apex, narrowed at the 

 base, ii'-8' long, i'-3' wide, sessile or nearly 

 so; spadix ii'-2' long, the upper portion cylin- 

 dric ; spathe green or striped, the lower portion 

 fluted, the apex rather long-acuminate ; berries 

 shining, 4"-$" in diameter, forming an ovoid 

 head over i' in diameter 



In wet woods, often among sphagnum, moun- 

 tains of Pennsylvania and New Jersey. Reported 

 from New England. June-Aug. 



4. Arisaema Dracontium (L.) Schott. Green Dragon. Dragon-root. Fig. 1114. 



Arum Dracontium L. Sp. PI. 964. 1/53. 

 Arisaema Dracontium Schott, Melet. i: 17. 1832. 



Corms clustered. Leaves usually solitary, 8'-4 

 long, pedately divided into 5-17 segments, much longer 

 than the scape; segments obovate or oblong, 3'-io' 

 long, 9"~4' wide, abruptly acute at the apex, narrowed 

 to a sessile or nearly sessile base, entire or the lateral 

 ones somewhat lobed ; scape sheathed by membranous 

 scales at the base; spathe greenish or whitish, narrowly 

 convolute, acuminate, i'-2' long, enwrapping the spadix, 

 the upper part of which tapers into a slender appendage 

 exserted i'-7' beyond its apex; inflorescence of the 

 staminate plant nearly as long as the tubular part of 

 the spathe; in the monoecious plant the pistillate 

 flowers are borne on the lower part of the spadix ; 

 ovary turbinate, with 6-8 bottle-shaped ovules ; stigmas 

 depressed ; berries reddish-orange in large ovoid heads. 



Mostly in wet woods and along streams, but sometimes 

 in dry soil, Maine to Ontario and Minnesota, south to 

 Florida, Kansas and Texas. May-June. 



2. PELTANDRA Raf. Journ. Phys. 89: 103. 1819. 



Bog herbs, with entire sagittate acute or acuminate leaves, the long petioles sheathing 

 the shorter scape at the base. Spathe elongated, convolute, or expanded above. Flowers 

 monoecious, covering the whole spadix. Perianth none. Staminate flowers uppermost, 

 consisting at first of irregularly 4-sided oblong flat-topped shields, from the edges of which 

 appear 6-10 imbedded anthers opening by apical pores, the shields ultimately shrivelling 

 and leaving the linear-oblong anthers nearly free. Ovaries ovoid, surrounded at base by 4 

 or 5 white fleshy scale-like staminodia, i-celled ; ovules solitary or few, amphitropous ; style 

 erect, short, thick, tipped with a small stigma. Fruit a green or red berry, i-3-seeded, when 

 ripe forming large globose heads at the extremity of the finally recurved scape, and enclosed 

 in the persistent leathery base of the spathe. Seeds surrounded by a tenacious jelly; endo- 

 sperm none. [Greek, referring to the shield-shaped staminate disks.] 



The genus consists of two species, the following one being the type ; the other inhabits marshes 

 and springs from North Carolina to Florida. 



