32 PORTULACACEiE. 



3. CLAYTONIA, Linnaeus. 



a. Annuals with fibrous roots, rarely with bulblets. 



Stems simple, bearing a single pair of united or distinct leaves. 



Leaves united into a cup enclosing the raceme - 1 



Leaves united at the base on one or both sides 2, 3 



Leaves distinct (No. 4 vv'ith bulblets at base) 2, 3, 4, 5, 11, 13 



Stems usually branching, leafy. 



Leaves opposite stems often rooting at joints and bulbiferous 6 



Tjeaves alternate 7, 8, 9, 10 



h. Perennials, with deep-seated tubers, stem leaves, a pair or a vifhorl. . 11, 12, 13 



1. C. perfoliata, Donn. From 1 to 12 inches high: radical leaves broad. 

 Var. parviflora, Torr. Radical leaves all linear or spatulate. 



2. C. spathulata, Dougl. Very slender: leaves distinct or united on one side. 



3. C. exigua, T. &. G. Glaucous: leaves nearly filiform; the pair broader, united 

 at base. 



4. C. bulbifera, Gr. Stems lax: long pedicels with conspicuous bracts. 



5. C. cordifolia, Watson. Pair of leaves ovate, acute; radical, cordate: no bracts. 



6. C. Chamissonis, Esch. Leaves oblanceolate: petals white. 



7. C. parviflora, Mocino. Very slender: leaves broadly spatulate, small. 



8. C. dichotoma, Nutt. Small: leaves linear: petals unequal: stamens 3. 



9. C. linearis, Dougl. Leaves slender, clasping: sepals broad, often colored: petals 

 white. 



10. C. diffusa, Nutt. Leaves ovate or deltoid, pctioled: racemes often axillary. 



11. C. Caroliniana, Michx., var. sessilifolia, Torr. Usually one radical leaf; the 

 pair lanceolate to linear: a single scarious bract. 



12. C. triphylla, Watson. Leaves slender: raceme compound, bracts scarious. 



13. C. Nevadeusis, Watson. Leaves ovate to orbicular: petals 3-5 lines long, clawed. 



4. MONTIA, Lmnseus. 



1. M. fontana, L. Stemrweak, often matted: flowers minute: capsule globose. 



2. JUL, Howellii, Watson. Leaves opposite the scarious triangular bracts of racemes. 



5. CALYPTRIDIUM, Nuttall. 



1. C. umbellatum, Greene, Umbel capitate: petals 4: stamens 3: style exserted. 

 This plant is Spraguea umbellata, Torr. 



2. C, quadripetalum, Watson. Petals 4: stamen 1: stigmas nearly sessile. 



3. C. roseum, Watson. Petals 2, much shorter than the unequal sepals. 



4. C. monandrum, Nutt. Petals 2, equalling the sepals, a line long or less. 



