PORTULACACKjE. 



97 



8. CLAYTONIA, Linnaeus. 



a, AnnnalB with fibrous roots, rarely with bnlblets. 



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, 8 



Leaves distinct (No. 4 with bulblets at base). 2, 8, 4, 6, 11, 13 



Stems usually branching, leafy. 



Leaves opposite stems often rooting at joints and bulbiferous 6 



Leaves alternate 7, 8, 9, 10 



b. Perennials, with deep-seated tubers, stem leaves, a pair or a whorl. . 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. 0. bulbifera, Gr. Stems lax: long pedicels with conspicuous bracts. 



5. 0. 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. 0. linearis, Dougl. Leaves slender, clasping: sepals broad, often colored: petals 

 white. 



10. 0. diffusa, Nutt. Leaves ovate or deltoid, petioled: racemes often axillary. 



11. C. Caroliniana, Michr., 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. 0. Nevadensis, Watson. Leaves ovate to orbicular: petals 3-5 lines long, clawed. 



4. MONTIA, Linnaeus. 



1. 1ft. fontana, L. Stems weak, often matted: flowers minute: capsule globose. 



2. M. Howellii, Watson. Leaves opposite the scarious triangular bracts of racemea 



5. CALYPTRIDIUM, Nuttall. 



1. O. tunbellatum, Greene, Umbel capitate: petals 4: stamens 3: style ezsertod* 

 This plant is Spraguea umbellata, Torr. 



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



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



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



