GENUS I. BORAGE FAMILY, 75 
5. Heliotropium convolvulaceum (Nutt.) A. Gray. Bindweed Heliotrope. 
Fig. 3506. 
Euploca convolvulacea Nutt. Trans. Am. Phil. Soc. (IL.) 
5: 189. 1833-37. 
HA. ance A. Gray, Mem. Am. Acad. 6: 403. 
1857. 
Annual, strigose-canescent, usually much branched, 
6’-15’ high, the branches ascending. Leaves oblong, 
ovate, or lanceolate, entire, short-petioled, obtuse or 
acute at the apex, narrowed at the base, 3’-1}’ long; 
flowers numerous, fragrant, very short-peduncled, 
terminal and lateral, mostly solitary and opposite the 
leaves; calyx-segments lanceolate, acuminate! equal ; 
corolla white, strigose, 8-10” long, about 6” broad, 
its tube narrowed at the throat, longer than the calyx 
and the angulate-lobed limb; anthers inserted on the 
tube of the corolla, slightly cohering by their tips; 
style filiform; stigma with a tuft of bristly hairs; 
fruit 2-lobed, pubescent, each lobe splitting into 2 
I-seeded nutlets. 
In dry sandy soil, Nebraska to Texas, Utah and 
Mexico. July—Sept. 
6. Heliotropium indicum L. Indian Helio- 
trope. Fig. 3507. 
Heliotropium indicum L. Sp. Pl. 134. 1753. 
Annual, more or less hirsute or hispid; stem com- 
monly branched, 1°-3° high. Leaves ovate or oval, 
obtuse or acute at the apex, obtuse rounded or sub- 
cordate at the base, 2’-6’ long, 1'-33’ wide, repand or 
undulate, borne on margined petioles 4’-23’ long; 
flowers blue, 2-3” broad, sessile in terminal dense 
bractless usually solitary scorpioid spikes which be- 
come 3’-6’ long in fruit; calyx-segments lanceolate, 
acute, shorter than the strigose corolla-tube; style 
very short, deciduous; fruit deeply 2-lobed, glabrous, 
the lobes divergent, each finally splitting into 2 
nutlets, each of which is ribbed on the back. 
In waste places, North Carolina to Kentucky, Illinois, 
Missouri, Florida and Texas. Naturalized from India. 
Also in ballast about the northern seaports. Widely 
distributed in warm regions as a weed. ‘Turnsole. 
May-Nov. 
2. CYNOGLOSSUM [Tourn.] L. Sp. Pl. 134. 1753. 
Hirsute or hispid (rarely glabrous) mostly tall herbs, with alternate entire leaves, the 
basal long-petioled, and purple blue or white flowers in panicled, more or less scorpioid 
racemes. Calyx 5-cleft or 5-parted, enlarged and spreading or reflexed in fruit. Corolla 
funnelform or salverform, the tube short, the throat closed by 5 scales opposite the imbri- 
cated rounded lobes. Stamens included; filaments short; anthers ovate or oblong. Ovary 
deeply 4-lobed, separating into 4 diverging nutlets in fruit; style mostly slender. Nutlets 
oblique, flat or convex above, attached laterally to the convex or conic receptacle, covered 
with short barbed prickles. [Greek, dog’s tongue.] 
About 75 species of wide geographic distribution. Besides the following, some 3 others occur 
in western North America. Type species: Cynoglossum officinale L. 
Stem leafy to the top; flowers reddish, purple or white; nutlets flat. 1. C. officinale. 
Stem leafless above; flowers blue; nutlets convex. reas 
Flowers about 5” broad; nutlets about 4” long. ; 2. C. virginianum. 
Flowers about 3%” broad; nutlets about 214” long. 3. C. boreale. 
