610

INDEX.

areolae or corpuscula in the albumenof all the European genera of Co-nifer®, 574-5

Scitamine®, structure of flower in, 49 ;formation of albumen in, 452

Scoresby, Captain William, catalogueof plants collected in Spitzbergen by, 179

Scrophularin®, observations on thespecies found in the vicinity of theCongo , 135 ; in the collection fromCentral Africa , 296

Seeds never produced entirely naked,359

Seeds and fruits, on some remarkabledeviations from the usual struc-ture of, 357

Seguieria forms with Petiveria, a sub-division of Phytolace®, 140

Sempervivum tectorum, monstrosi-ties in, illustrating the origin ofovula, 563

Sesame®, one species in the collectionfrom central Africa , 295

Smeathman , Henry, number of speciesof plants collected by him at Sierra Leone , 101

Smeathmannia referred to Passiflore®,its character and affinities, 386-7note, 121, 381

Smith, Christian, plants collected byhim in the vicinity of the Congo ,99, 173

Smith, Thomas, his observations onthe general existence of the fora-men in the membranes of the ovu-lum, 411

Sowerby, G. B., jun., his drawings ofTriplosporite, 585

Spheuoclea Zeylanica, identity ofspecimens from Congo , and variousparts of Africa , Asia, and A merica,170,171

Spiral tubes produced on the surfaceof the aerial roots of Orchide ®, 548;on the inner surface of the corollaof Ceropegia, 549; in the woolenclosing the spines of Mammil-laria and Melocactus , ibid.; in thecoma of the seed of an Apocyneousplant from Brazil , ibid.

Spiral vessels, stratum of, beneath theouter coat of the seed of Casuarina,46

Spiral fibrous, tubes containing and

emitting mucus in Blennodia andMatthioia, 316

Spiral vessels in the bulb-like seeds ofcertain Liliaceous plants, 364; donot appear to exist in any part ofBafflesia Arnoldi, 377; shown toexist in various parts, 412; existalso in Hydnora, Cytinus, Bala-nophora, Cynomorium and Helosis,

Spitzbergen , catalogue of plants col-lected in, by Captain Scoresby,179

Stackhouse®, characters of the orderand observations on its distributionin Terra Australis, 27Steiis, spirally striated cells in, 515Sterculia, several species produceseeds which become naked by theearly regular dehiscence of theovarium, 363

Sterculiace®, compared with Rafflesia,388-9

Stigma, on the relative position of thedivisions of stigma and parietalplacent ® in the compound ovariumof plants, 553—563 ; origin andtype of, 558; necessarily consist-ing of two parts, not terminal butlateral, 558, 560; whence inferred,ibid.; the two stigmata ofeach carpel generally confluent,559; exceptions in Parnassia, Cru-cifer®, and Papaverace®, wherethe stigmata as well as the pla­ cent ® of the adjoining carpels areconfluent, ibid.; how proved, ibid.;in Iride®, also, where the stigmataalternate with the cells of the com-pound trilocular ovarium, ibid,characters derived from modifica-tions of stigmata of less value,560; composition of, in Orchide ®,501-4; functions of its differentlobes in, 503 ; relative position ofstamina and stigmata, 504Sturt, Captain Charles, plants foundin his expedition into the southerninterior of Australia , 313, 337; inhis expeditions to the Darling,Murrumbidgee and Murray, 338Style, a mere attenuation of the wholebody of the ovarium, 558Stylidere, observations on the orderand its distribution in Terra Aus-