heliotropium BORAGIN^CE^E 477 



PBCTOCARYA 



subulate tip or appendage. Ovules pendulous. Seeds with a straight 

 or incurved embryo in sparing or copious albumen. 



2 HELIOTROPIUM Tourn. L. Gen, n. 179. 



Low herbs or shrubs with entire or rarely denticulate leaves 

 and small flowers in scorpioid cymes. Calyx deeply 5-parted, 

 persistent. Corolla salverform or funnelform, plaited and mostly 

 imbricated in the bud. Stamens included: filaments short or 

 none: anthers connivent, sometimes cohering by pointed tips. 

 Style entire, sometimes wanting: stigma peltate ^annular, forming 

 a complete ring surmounted by an entire or 2-lobed tip or appen- 

 dage. Ovary 4-celled with a single pendulous ovule in each cell. 

 Fruit dry, 2- or 4-lobed, separating into 2 indurated 2-celled and 

 2-seeded closed carpels, or more commonly into 4 1-seeded nutlets 



H. (urassavicum L. Sp. 130. Wholly glabrous and more or leas 

 glaucous : stems diffusely spreading; 6-12 inches long from a perennial root : 

 leaves succulent, obovate to oblanceolate or nearly linear, 1-2 inches long : 

 spikes mostly in pairs or twice forked, densely flowered, bractless: corolla 

 white with a yellow eye or changing to blue, with a rather ample 5-lobed 

 limb and open throat, the lobes rounded-ovate, rather shorter than the 

 tube : anthers free : style none : stigma umbrella-shaped, broad as the glab- 

 rous ovary: fruit 4-lobed, separating at maturity into 4 1-seeded nutlets. 

 In saline soil, interior of Oregon, and along the coast of most of the warmer 

 parts of the World. 



1 1 Ovary 4-parted ( rarely 2-parted) from above into 1-celled 

 1-ovuled divisions surrounding the style. Stigma not annular. 



Tribe Hi, Boragese DC. Prodr. x< 1. Chiefly herbs with some- 

 what mucilaginous watery juice and entire leaves. Flowers mostly 

 near but not in the axils of leaves or bracts, or bractless in so-called 

 spikes or racemes. Style entire, with a • depressed or elevated base 

 to which the nutlets are attached (called the gynobase) Stigma 

 truncate or depressed-capitate. Ovules amphitropous or almost 

 orthotropous and commonly ascending or erect, or anatropous and 

 commonly pendulous. Nutlets Jf, or by abortion fewer, distinct or 

 at base united into pairs. Seeds without albumen. 



* Nutlets attached above the middle, wholly flat and thin, hori- 

 zontally divergent in pairs or radiate: the margins pectinately and 

 uncinately setiferous. 



3 PECTQCAR/A DC. in Meisn. Gen. 279. 



Small annuals witfrlimperfectly opposite leaves and small flow- 

 ers scattered along the whole length of the stem. Calyx deeply 

 5-cleft or 5-parted, spreading or reflexed in fruit. Corolla-appen- 

 dages with strong fornicate processes, almost closing the throat. 

 Stamens short, included. Style short : with capitate stigma. 

 Nutlets flat and thin, attached at the inner end underneath to the 

 small depressed gynobase, either winged, laciniate-bordered or 

 pectinately setose around the thin margins ; the bristles or prickles 

 simply uncinate at tip. 



