70 PORTULACE^. [CLAYTONIA. 



opposite and adnate to the bases of the petals. Ovary free ; style entire or 

 3 -fid at the tip ; ovules few. Capsule membranous, 3-valved. DISTRIB. 

 America, N.W. Asia, Australia ; species 20. ETYM. Dr. J. J. Clayton, 

 an American botanist. 



1. C. PERFOLIA'TA, Don ; radical leaves rhomboid, cauline 2 connate. 



A garden escape, rapidly becoming naturalized in many'places ; fl. May- July. 

 Annual, tufted, fleshy, 6-12 in. Cauline leaves connate into a suborbicular 

 blade. Flowers small, white. DISTRIB. N.W. America. 



2. C. ALSINOI'DES, Sims ; radical leaves ovate acuminate, cauline sessile 

 orbicular. 



A garden escape, rapidly becoming naturalized near Glasgow and elsewhere ; 

 fl. May-July. Annual. Flowers more numerous and much larger than in 

 C. perfoliata, and petals chiefly bifid. DISTRIB. N."W. America. 



ORDER XIII*. TAMARISCI'KE^. 



Shrubs or small trees. Leaves very small, often scale-like, imbricate, 

 amplexicaul, exstipulate. Inflorescence of solitary or panicled axillary 

 spikes. Sepals 5, rarely 4, imbricate in bud. Petals 5, rarely 4, distinct 

 or connate below, imbricate in bud. Stamens 4, 5, 8, or 10 inserted on 

 the disk, distinct or connate below ; anthers versatile. Disk hypogynous 

 or slightly perigynous, 10-glandular. Ovary free, 1- or imperfectly 2-5- 

 celled ; styles 2-5, distinct or connate, or 2-5 sessile stigmas ; ovules 2 or 

 more, basal, erect, anatropous, raphe ventral, micropyle inferior. Capsule 

 2 5-valved. Seeds erect, usually more or less comose or winged, albumen 

 fleshy farinaceous or ; embryo straight, cotyledons flat. DISTRIB. Cold, 

 temp, and hot regions, often in sandy or saline places ; genera 5 ; species 

 40. AFFINITIES. With CaryopJiyllece, Portulacece, and Franlceniacecz. 

 PROPERTIES. 3 Tamarix yields manna and galls, and its ashes soda. 



TAM'ARIX, L. TAMARISK. 



Sepals 4-5, distinct. Petals 4-5, distinct or connate at the base. Stamens 



4, 5, 8, or 10. Ovary narrowed upwards ; styles 3-4, short, thick ; ovules 

 many. Capsule 3-valved. Seeds many, with a lateral and terminal pencil 

 of hairs, albumen ; embryo ovoid. DISTRIB. Of the Order ; species 20. 

 ETYM. The Tamaris, a river of Spain, where Tamarisk abounds. 



T. GAL'LICA, L. ; glabrous, disk acutely 5-angled. T. anglica, "Webb. 



5. and E, coasts of England, and Channel Islands, planted ; fl. July-Sept. 

 An evergreen shrub or small tree, 5-10 ft. Branchlets excessively slender 

 and feathery. Leaves on the branchlets extremely minute, closely imbricate, 

 triangular, auricled, keeled ; on the older wood much larger, | in., subulate. 

 Flowers in. diam., white or pink, in catkin-like obtuse spikes 1 in. 

 Sepals lanceolate. Petals persistent. Anthers apiculate. Capsule 

 3-gonous. DISTRIB. Shores of Atlantic and Mediterranean, W. Asia to 

 N.W. India. 



