Exhibit 4.3


 


[FACE]


 


	Number	CUSIP            


 


BOXWOOD MERGER CORP.


INCORPORATED UNDER THE LAWS OF THE STATE OF
DELAWARE


WARRANTS


THIS WARRANT SHALL BE VOID IF NOT EXERCISED
PRIOR TO


THE EXPIRATION OF THE EXERCISE PERIOD PROVIDED
FOR


IN THE WARRANT AGREEMENT DESCRIBED BELOW


 


	This Certifies that	 	is the
	 	 	 
	registered holder of	 	Warrant(s)


 


 (the “Warrants” and each, a
“Warrant”) to purchase shares of Class A common stock, $0.0001 par value (“Common Stock”), of Boxwood
Merger Corp., a Delaware corporation (the “Corporation”). 


 


Each Warrant entitles the
holder, upon exercise during the Exercise Period set forth in the Warrant Agreement referred to below, to receive from the Corporation
that number of fully paid and nonassessable shares of Common Stock as set forth below, at the exercise price (the “Warrant
Price”) as determined pursuant to the Warrant Agreement, payable in lawful money (or through “cashless exercise”
as provided for in the Warrant Agreement) of the United States of America upon surrender of this Warrant Certificate and payment
of the Warrant Price at the office or agency of the Warrant Agent referred to below, subject to the conditions set forth herein
and in the Warrant Agreement. Defined terms used in this Warrant Certificate but not defined herein shall have the meanings given
to them in the Warrant Agreement.


 


 Each Warrant is initially
exercisable for one fully paid and non-assessable share of Common Stock. The number of the shares of Common Stock issuable upon
exercise of the Warrants is subject to adjustment upon the occurrence of certain events as set forth in the Warrant Agreement. 


 


The initial Warrant Price
per share of Common Stock for any Warrant is equal to $11.50 per share. The Warrant Price is subject to adjustment upon the occurrence
of certain events as set forth in the Warrant Agreement.


 


Subject to the conditions
set forth in the Warrant Agreement, the Warrants may be exercised only during the Exercise Period and to the extent not exercised
by the end of such Exercise Period, such Warrants shall become void.


 


Reference is hereby made
to the further provisions of this Warrant Certificate set forth on the reverse hereof and such further provisions shall for all
purposes have the same effect as though fully set forth at this place.


 


This Warrant Certificate
shall not be valid unless countersigned by the Warrant Agent, as such term is used in the Warrant Agreement.


 


This Warrant Certificate
shall be governed by and construed in accordance with the internal laws of the State of New York, without regard to conflicts of
laws principles thereof.


 




    	 	 	 



     


    

  


	 	BOXWOOD MERGER CORP.


 


	 	By:	 
	 	 	Name:
	 	 	Title:


 


	 	CONTINENTAL STOCK TRANSFER & TRUST COMPANY, as Warrant Agent


 


	 	By:	 
	 	 	Name:
	 	 	Title:


 




    	 	 	 



     


    

 


[Form of Warrant Certificate]


 


[BACK]


 


The Warrants evidenced
by this Warrant Certificate are part of a duly authorized issue of Warrants entitling the holder on exercise to receive              shares
of Common Stock and are issued or to be issued pursuant to a Warrant Agreement dated as of                   ,
2017 (the “Warrant Agreement”), duly executed and delivered by the Corporation to Continental Stock Transfer &
Trust Company, a New York corporation, as warrant agent (the “Warrant Agent”), which Warrant Agreement is hereby incorporated
by reference in and made a part of this instrument and is hereby referred to for a description of the rights, limitation of rights,
obligations, duties and immunities thereunder of the Warrant Agent, the Corporation and the holders (the words “holders”
or “holder” meaning the Registered Holders or Registered Holder, respectively) of the Warrants. A copy of the Warrant
Agreement may be obtained by the holder hereof upon written request to the Corporation. Defined terms used in this Warrant Certificate
but not defined herein shall have the meanings given to them in the Warrant Agreement.


 


Warrants may be exercised
at any time during the Exercise Period set forth in the Warrant Agreement. The holder of Warrants evidenced by this Warrant Certificate
may exercise them by surrendering this Warrant Certificate, with the form of Election to Purchase set forth hereon properly completed
and executed, together with payment of the Warrant Price as specified in the Warrant Agreement (or through “cashless exercise”
as provided for in the Warrant Agreement) at the principal corporate trust office of the Warrant Agent. In the event that upon
any exercise of Warrants evidenced hereby the number of Warrants exercised shall be less than the total number of Warrants evidenced
hereby, there shall be issued to the holder hereof or his, her or its assignee, a new Warrant Certificate evidencing the number
of Warrants not exercised.


 


Notwithstanding anything
else in this Warrant Certificate or the Warrant Agreement, no Warrant may be exercised unless at the time of exercise (i) a registration
statement covering the shares of Common Stock to be issued upon exercise is effective under the Securities Act and (ii) a prospectus
thereunder relating to the shares of Common Stock is current, except through “cashless exercise” as provided for in
the Warrant Agreement.


 


 The Warrant Agreement
provides that upon the occurrence of certain events the number of shares of Common Stock issuable upon exercise of the Warrants
set forth on the face hereof may, subject to certain conditions, be adjusted. If, upon exercise of a Warrant, the holder thereof
would be entitled to receive a fractional interest in a share of Common Stock, the Corporation shall, upon exercise, round down
to the nearest whole number of shares of Common Stock to be issued to the holder of the Warrant. 


 


Warrant Certificates, when
surrendered at the principal corporate trust office of the Warrant Agent by the Registered Holder thereof in person or by legal
representative or attorney duly authorized in writing, may be exchanged, in the manner and subject to the limitations provided
in the Warrant Agreement, but without payment of any service charge, for another Warrant Certificate or Warrant Certificates of
like tenor evidencing in the aggregate a like number of Warrants.


 


Upon due presentation for
registration of transfer of this Warrant Certificate at the office of the Warrant Agent a new Warrant Certificate or Warrant Certificates
of like tenor and evidencing in the aggregate a like number of Warrants shall be issued to the transferee(s) in exchange for this
Warrant Certificate, subject to the limitations provided in the Warrant Agreement, without charge except for any tax or other governmental
charge imposed in connection therewith.


 




    	 	 	 



     


    

  


The Corporation and the
Warrant Agent may deem and treat the Registered Holder(s) hereof as the absolute owner(s) of this Warrant Certificate (notwithstanding
any notation of ownership or other writing hereon made by anyone), for the purpose of any exercise hereof, of any distribution
to the holder(s) hereof, and for all other purposes, and neither the Corporation nor the Warrant Agent shall be affected by any
notice to the contrary. Neither the Warrants nor this Warrant Certificate entitles any holder hereof to any rights of a stockholder
of the Corporation.


 




    	 	 	 



     


    

  


Election To Purchase


 


(To Be Executed Upon Exercise of Warrant)


 


The undersigned hereby
irrevocably elects to exercise the right, represented by this Warrant Certificate, to receive                      shares
of Common Stock and herewith tenders payment for such shares to the order of Boxwood Merger Corp. (the “Corporation”)
in the amount of $               in accordance with
the terms hereof. The undersigned requests that a Certificate for such shares be registered in the name of                  ,
whose address is                   and
that such shares be delivered to                  ,
whose address is                  . If
said number of shares is less than all of the shares of Common Stock purchasable hereunder, the undersigned requests that a new
Warrant Certificate representing the remaining balance of such shares be registered in the name of                  ,
whose address is                  , and
that such Warrant Certificate be delivered to                  ,
whose address is                  .


 


In the event that the Warrant
has been called for redemption by the Corporation pursuant to Section 6 of the Warrant Agreement and the Corporation
has required cashless exercise pursuant to Section 6.3 of the Warrant Agreement, the number of shares that this Warrant
is exercisable for shall be determined in accordance with subsection 3.3.1(b) and Section 6.3 of the Warrant
Agreement.


 


In the event that the Warrant
is a Private Placement Warrant that is to be exercised on a “cashless” basis pursuant to subsection 3.3.1(c)
of the Warrant Agreement, the number of shares that this Warrant is exercisable for shall be determined in accordance with subsection 3.3.1(c)
of the Warrant Agreement.


 


In the event that the Warrant
is to be exercised on a “cashless” basis pursuant to Section 7.4 of the Warrant Agreement, the number of
shares that this Warrant is exercisable for shall be determined in accordance with Section 7.4 of the Warrant Agreement.


 


In the event that the Warrant
may be exercised, to the extent allowed by the Warrant Agreement, through cashless exercise (i) the number of shares that this
Warrant is exercisable for would be determined in accordance with the relevant section of the Warrant Agreement which allows for
such cashless exercise and (ii) the holder hereof shall complete the following: The undersigned hereby irrevocably elects to exercise
the right, represented by this Warrant Certificate, through the cashless exercise provisions of the Warrant Agreement, to receive
shares of Common Stock. If said number of shares is less than all of the shares of Common Stock purchasable hereunder (after giving
effect to the cashless exercise), the undersigned requests that a new Warrant Certificate representing the remaining balance of
such shares be registered in the name of                  ,
whose address is                  , and
that such Warrant Certificate be delivered to                  ,
whose address is                  .


 




    	 	 	 



     


    

  


	Date:                   , 	 
	 	 
	 	(Signature)
	 	 
	 	 
	 	 
	 	 
	 	 
	 	(Address)
	 	 
	 	 
	 	(Tax Identification Number)


 


Signature(s) Guaranteed:


By


	 
	 


 


THE SIGNATURE(S) MUST BE GUARANTEED BY AN ELIGIBLE GUARANTOR INSTITUTION
(BANKS, STOCKBROKERS, SAVINGS AND LOAN ASSOCIATIONS AND CREDIT UNIONS WITH MEMBERSHIP IN AN APPROVED SIGNATURE GUARANTEE MEDALLION
PROGRAM, PURSUANT TO S.E.C. RULE 17Ad-15 UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED).