33 PORTULACACES. 
3. CLAYTONIA, Linneus. 
@. Annuals with fibrous roots, rarely with bulblets. 
Stems simple, bearing a single pair of united or distinct leaves. 
‘Geaves united into a cup enclosing the raceme. ...........0 ess seeccecaceecccecseees 1 
Leaves united at the base on one or both sides..............ceccacccccesccectecs 2,3 
Leaves distinct (No. 4 with bulblets at base),.............eee0- .. 2, 3, 4, 6, 11, 18 
Stems usually branching, leafy. 
Leaves opposite stems often rooting at joints and bulbiferous..............seeeeeeees 6 
Deaves:al ber nate sic. c.ciais vere eaepest aida fiereusara veasardiwraioe acannon sweeten wesiale 7, 8, 9, 10 
b. Perennials, with deep-seated tubers, stem leaves, a pair or a whorl.. 11, 12, 13 
1. ©. perfoliata, Donn. From 1 to 12 inches high: radical leaves broad. 
Var. parviflora, Torr. Radical leaves all linear or spatulate. 
2. ©. spathulata, Dougl. Very slender: leaves distinct or united on one side. 
3. ©. exigua, T. & G. Glaucous: leaves nearly filiform; the pair broader, united 
at base. 
bulbifera, Gr. Stems lax: long pedicels with conspicuous bracts, 
cordifolia, Watson. Pair of leaves ovate, acute; radical, cordate: no bracts. 
Chamissonis, Esch. Leaves oblanceolate: petals white. 
parviflora, Mocino. Very slender: leaves broadly spatulate, small. 
dichotoma, Nutt. Small: leaves linear: petals unequal: stamens 3. 
linearis, Dougl. Leaves slender, clasping: sepals broad, often colored: petals 
white. 
10. ©. diffusa, Nutt. Leaves ovate or deltoid, petioled: racemes often axillary. 
ll. ©. Caroliniana, Michx., var. sessilifolia, Torr. Usually one radical leaf; the 
pair lanceolate to linear: a single scarious bract. 
12. ©. triphylla, Watson. Leaves slender: raceme compound, bracts scarious. 
13. GO. Nevadensis, Watson. Leaves ovate to orbicular: petals 3-5 lines long, clawed. 
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4. MONTIA, Linnzus. 
L M. fontana, L. Stems-weak, often matted: flowers minute: capsule globose. 
2 MW. Howellii, Watson. Leaves opposite the scarious triangular bracts of racemes. 
6. CALYPTRIDIUM, Nuttall. 
h. ©. umbellatum, Greene, Umbel capitate: petals 4: stamens 8: style exserted. 
This plant is Spraguea umbellata, Torr. 
2. C. quadripetalum, Watson. Petals 4: stamen 1: stigmas nearly sessile, 
3. ©. roseum, Watson. Petals 2, much shorter than the unequal sepals, 
4. O mopandrum, Nutt. Petals 2, equalling the sepals, a line long or less. 
