riose_, thin, dry, and membranous.

_Scion_, a shoot or slip used for grafting.

_Scleros_, Greek for hard, hence _Sclerocarpous_, hard-fruited.

_Scobiform_, resembling sawdust.

_Scorpioid_ or _Scorpioidal_, curved or circinate at the end, 77.

_Scrobiculate_, pitted; excavated into shallow pits.

_Scurf_, _Scurfiness_, minute scales on the surface of many leaves, as
of Goosefoot.

_Scutate_, _Scutiform_, buckler-shaped.

_Scutellate_, or _Scutelliform_, saucer-shaped or platter-shaped.

_Secund_, one-sided; i. e. where flowers, leaves, &c., are all turned to
one side.

_Secundine_, the inner coat of the ovule, 110.

_Seed_, 125. _Seed-leaves_, see _cotyledons_. _Seed-vessel_, 127.

_Segment_, a subdivision or lobe of any cleft body.

_Segregate_, separated from each other.

_Semi-_, in compound words of Latin origin, half; as

_Semi-adherent_, as the calyx or ovary of Purslane; _Semicordate_,
half-heart-shaped; _Semilunar_, like a half-moon; _Semiovate_,
half-ovate, &c.

_Seminal_, relating to the seed (_Semen_). _Seminiferous_, seed-bearing.

_Sempervirent_, evergreen.

_Sensitiveness_ in plants, 149, 152.

_Senary_, in sixes.

_Sepal_, a leaf or division of the calyx, 14, 79.

_Sepaloid_, sepal-like. _Sepaline_, relating to the sepals.

_Separated Flowers_, those having stamens or pistils only, 85.

_Septate_, divided by partitions.

_Septenate_, with parts in sevens.

_Septicidal_, where dehiscence is through the partitions, 123.

_Septiferous_, bearing the partition.

_Septifragal_, where the valves in dehiscence break away from the
partitions, 123.

_Septum_ (plural _septa_), a partition or dissepiment.

_Serial_, or _Seriate_, in rows; as _biserial_, in two rows, &c.

_Sericeous_, silky; clothed with satiny pubescence.

_Serotinous_, late in the season.

_Serrate_, the margin cut into teeth (_Serratures_) pointing forwards,
55.

_Serrulate_, same as the last, but with fine teeth.

_Sessile_, sitting; without any stalk.

_Sesqui-_, Latin for one and a half; so _Sesquipedalis_, a foot and a
half long.

_Seta_, a bristle, or a slender body or appendage resembling a bristle.

_Setaceous_, bristle-like. _Setiform_, bristle-shaped.

_Setigerous_, bearing bristles. _Setose_, beset with bristles or bristly
hairs.

_Setula_, a diminutive bristle. _Setulose_, provided with such.

_Sex_, six. _Sexangular_, six-angled. _Sexfarious_, six-faced.

_Sheath_, the base of such