254 
FLORA OF ADEN. 
Calyx 5-cleft ; lobes linear or lanceolate. Corolla-tube cylindric, usually 
naked at the throat ; lobes 5, imbricate or induplicate. Stamens 5, 
epipetalous, included. Ovary completely or imperfectly 4-celled, 
4-ovulate ; ovule pendulous from the inner angle of the cell near its 
apex ; style terminal, usually with a depressed conic or broad stigmatic 
ring below the apex. 
Fruit somewhat fleshy, 2- or 4-sulcate or -lobed, at length divid- 
ing into 4 distinct or geminately cohering nutlets. Seeds straight or 
curved ; albumen usually scanty ; cotyledons plano-convex ; radicle 
short. 
Species about 220. 
Distribution : — Tropical and temperate zones. 
Corolla-lobes distinctly caudate 
Corolla-lobes not caudate 
Annuals ...... 
Perennials 
Stigma with two long arms 
Stigma with a conical crest 
Spikes ebracteate 
Spikes many -flowered, at length lax 
Spikes few-flowered, dense 
Style-arms very unequal . 
Style arms not so 
Spikes bracteate 
Spikes short, dense, 3 — 6-flowered 
Spikes subelongate, lax 
2. H. zeylanicum. 
3. H. pterocarpum. 
4. H. ophioglossum. 
1. H. strigosum, 
8. H. paradoxum. 
7. H. undulatum. 
5. H. lignosum. 
6. H. adenense. 
1. Ileliotroimmi strigosum (Forsk.) Willd. Sp. PI. 1,743; DC. 
Prodr. IX, 546.; Anders. Journ. Linn. Soc. V, Suppl. p. 25 ; Boiss. Fh 
Or. IY, 143 ; Hook. FI. Brit. Ind. IV, 151. 
Pleliotropium brevifolium Wall Cat. 914 ; DC. Prodr. IX, 546. 
Heliotropium tenue Wall, (ex Anders.). 
Heliotropium fruticosum Forsk. FI. Aeg.-Arab. p. 38. 
Heliotropium parvifolium Edgw. Journ. As. Soc. Beng. XYI, 1216. 
Heliotropium bicolor Hochst. et Steud. in Schimp. PI. Abyss. n, 569. 
Heliotropium tenuifolium B. Br. Prodr. 494. 
Arabic name : — Hhashfe. 
Description : — Perennial. Boot more or less thick and woody. Stem 
slender, much branched, clothed with adpressed white bristly hairs. 
Leaves linear or linear-lanceolate, sessile or very shortly stalked, up to 
1J inches long, usually much smaller, with adpressed bristly hairs on 
both surfaces, revolute at the margins. 
Spikes very lax, finally 3 inches long ; lower flowers often shortly 
pedicellate and bracteate. Calyx 1 line long, hairy outside ; lobes from 
