GERANIUM FAMILY. 03 



R. frigyna. Planch. Leaves mostly obtuse, elliptic-obovnto, entire or 

 serrulate; styles 3. H. tktuaoVna, with acuminate leaves and 4 styles, 

 is im>bably a variety of the preceding. India. 



XXV. GERANIACEiE, GERANIUM FAMILY. 



As now received, ;i hn\ue ;uul multifarious order, not to be 

 characterized as a whole in any short and easy way, including 

 as it does Geraniums, Nasturtiums, Wood Sorrels, Balsams, 

 etc.,which have to be separately described. 



S 1. Flowers reyulnr : learrx si in pie, rarimisli/ lobe'l or ereii ilisserteil ; fjlands of the 

 disk ."', alleraate ivlth (he petals. Herbs. 



* Sepcds imbricate,- ovari/ o-celled, W-ovuled ; fruit dehiscent, the \-sceded carpels 



splitting elasticalhj from a prolonged axis. (Lessons, Figs. 35S, :35!t.) 



1. GERANIUM. Flowprs o-merons ; sepals usually slender-pointed; stamens with 



anthers 10 (rarely :>) ; the recurving bases of the styles or tails of the carpels in fruit 

 naked inside. Leaves with stipules. Herbage scented. 



2. ERODIUM. Stamens with anthers only o. Styles when they split off from the beak, 



bearded inside, often twisting spirally ; otherwise as Geranium. 



* * Sepals valvate ; ovary ii-celled, ri-ovuted : the carpels flesh;/ and indehiscent, break- 



ing away from a very short axis ; leaves pinnately divided. 



3. LI.MXAXTHES. Sepals and petals 5, the latter convolute in the bud. Stamens 10, 



separate at tlie base. Style 1, o-lobed at the apex, rising from the center of the 

 5 ovaries, which in fruit become thickish and warty nutlets. 



4. FLCEliKEA. Sepals, .small petals, stigmas, and lobes of the ovary 3 ; and stamens 6; 



otherwise like Limiiaiithfs. 



§ 2. Floivers regular; leaves compound, of 3 obcordate leaflets ; disk glands 0. Herbs. 



.1. 0X.\LIS. Sepals and jn-t.-ils ,% the former imbricated, the latter convolute in the bud. 

 Stamens 10, monadelphous at base, the alternate ones shorter. Styles .5, separate on 

 a5-celled ovary, which becomes a membranaceous several-seeded pod. .luice sour 

 and watery. Flowers usually open only in sunshine. 



g 3. Flowers somewhat irregular. Geranium-like, the base of one sepal extending down- 

 ward on one side if the pedicel, forming a narrow tube or adherent spur. 

 Shrubby or fleshy stemmed. 



6. PELAIJGONIU.M. Sepals and petals 5; the two petals on tlic upper side of the flower 

 dilfering from the rest more or less in size or shape. Stamens with anthers fewer than 

 10, commonly T. Pistil, etc., as in Geranium. Herbage scented. Leaves with stipules. 



§ 4. Flowers very irreyidar, and unsymmetrical ; spur free. Tender herbs. 



T. Tr.OP.EOLU>L Sepals 5, united at the base, and on the upper side of the tlower e.\- 

 tended into a long, descending spur. Petals 5, or sometimes fewer, usually with claws ; 

 the two upper more or less dift'eront from the others and inserted at the mouth of the 

 spur. Stamens S, unequal or dis.similar; filaments usually turned downwards and 

 curving. Ovary of 3 lobes surrounding the base of a single style, in fruit becoming 

 S thick and fleshy closed, separate carpels, each containing a single large .seed. Herbs, 

 often climbing by their long leafstalks; the watery juice with the pungent odor and 

 taste of Cress. Leaves alternate ; stipules none or minute. Peduncles axillary, 1- 

 flowered. 



8. IMPATIICXS. Sepals and petals .similarly colored, the parts belonging to each not 

 readily distinguished. There are 2 small outer i)iecps, plainly sepals, on the sides of 

 the tlo'vcr ; then below (,as it hangs, bu; really on the upper sidcl a third sepal form- 



